Washington County, OR

County

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Population

597,695

1.48% 1-year growth

US Senator

Ron Wyden

Democratic Party

US Senator

Jeff Merkley

Democratic Party

Median Age

36.9

Poverty Rate

9.63%

Median Household Income

$83,068

2.62% 1-year growth

Median Property Value

$417,100

5.86% 1-year growth

Number of Employees

317,538

1.98% 1-year growth

About

In 2018, Washington County, OR had a population of 598k people with a median age of 36.9 and a median household income of $83,068. Between 2017 and 2018 the population of Washington County, OR grew from 588,957 to 597,695, a 1.48% increase and its median household income grew from $80,946 to $83,068, a 2.62% increase.

The 5 largest ethnic groups in Washington County, OR are White (Non-Hispanic) (64.9%), White (Hispanic) (10.9%), Asian (Non-Hispanic) (10.4%), Other (Hispanic) (4.64%), and Two+ (Non-Hispanic) (4.3%). 26.2% of the people in Washington County, OR speak a non-English language, and 89.6% are U.S. citizens.

The largest universities in Washington County, OR are Pacific University (1,213 degrees awarded in 2017), Altierus Career College-Tigard (207 degrees), and Sumner College (113 degrees).

The median property value in Washington County, OR is $417,100, and the homeownership rate is 62.3%. Most people in Washington County, OR commute by Drove Alone, and the average commute time is 23.8 minutes. The average car ownership in Washington County, OR is 2 cars per household.

Washington County, OR borders Columbia County, OR, Clackamas County, OR, Clatsop County, OR, Multnomah County, OR, Yamhill County, OR, and Tillamook County, OR.

About the photo: Washington County Courthouse in Hillsboro, Oregon

Photo by Jimmy Emerson, DVM

United States Oregon Portland-Vancouver-Hillsboro, OR-WA

COVID-19

Daily New Cases by Date

Showing data at the state level for Oregon. Hospitalization data for some states may be delayed or not reported.

This chart shows the number of COVID-19 daily new cases by date in Oregon, as a 7-day rolling average, compared with the four states with the most similar number of confirmed cases.

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Impact on Employment

Data is only available at the state level. Showing data for Oregon.

This chart shows weekly unemployment insurance claims in Oregon (not-seasonally adjusted) compared with the four states with the most similar impact.

The most recent data point uses Advance State Claims data, which can be revised in subsequent weeks.

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Community Mobility

Data is only available at the state level. Showing data for Oregon.

This chart presents movement trends over time in the state of Oregon across different categories of places such as retail and recreation, groceries and pharmacies, parks, transit stations, workplaces, and residential.

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Civics

In the 2016 presidential election, the popular vote in Washington County, OR went to Hillary Rodham Clinton with 56.9% of the vote. The runner-up was Donald J. Trump (30.9%), followed by Other (12.2%). The most partisan county was Lake County, OR with 76.9% of the vote going to Donald J. Trump running for the Republican Party.

Ron Wyden and Jeff Merkley are the senators currently representing the state of Oregon. In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

Oregon is currently represented by 5 members in the U.S. house, and members of the House of Representives are elected to 2-year terms.

Presidential Popular Vote Over Time

Showing data up to the 2016 election. Updated election results are currently being processed, and will be released in the coming months.

2016 Election Results

Hillary Rodham Clinton (56.9%)
Democratic Party
Donald J. Trump (30.9%)
Republican Party
Other (12.2%)
Other Party

In the 2016 presidential election, the popular vote in Oregon went to Hillary Rodham Clinton with 56.9% of the vote. The runner-up was Donald J. Trump (30.9%), followed by Other (12.2%).

The following chart shows the popular vote results in Oregon for each registered party from 1976 to 2016.

Presidential Popular Vote by County

Presidential voting results are only available at the county level. Showing data for the counties inside of Oregon.

Showing data up to the 2016 election. Updated election results are currently being processed, and will be released in the coming months.

Hillary Rodham Clinton

Popular Vote for Washington County, OR

56.9% for the Democratic Party

Most Partisan Counties in Oregon

Lake County, OR
76.9% for Donald J. Trump (Republican Party)
Grant County, OR
74% for Donald J. Trump (Republican Party)
Multnomah County, OR
73.3% for Hillary Rodham Clinton (Democratic Party)

In the 2016 presidential election, the most partisan county in Oregon was Lake County, OR with 76.9% of the vote going to Donald J. Trump running for the Republican Party.

The following map shows the counties in Oregon colored by their party leaning.

US Senators from Oregon

Senatorial voting results are only available at the state level. Showing data for Oregon.

Ron Wyden

Senator from Oregon

Assumed office on February 5, 1996
Elected to the seat following the resignation of Bob Packwood.

Jeff Merkley

Senator from Oregon

Assumed office on January 3, 2009

Ron Wyden and Jeff Merkley are the senators currently representing Oregon.

In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

The following chart shows elected senators in Oregon over time, excluding special elections, colored by their political party.

US Representatives from Oregon

Oregon is currently represented by 5 members in the U.S. house.

Members of the House of Representives are elected to 2-year terms, and the following chart shows the how the members for Oregon have changed over time starting in 2008.

Diversity

Washington County, OR is home to a population of 598k people, from which 89.6% are citizens. As of 2018, 17% of Washington County, OR residents were born outside of the country (102k people).

In 2018, there were 5.97 times more White (Non-Hispanic) residents (388k people) in Washington County, OR than any other race or ethnicity. There were 64.9k White (Hispanic) and 62.2k Asian (Non-Hispanic) residents, the second and third most common ethnic groups.

The most common foreign languages spoken in Washington County, OR are Spanish (73,762 speakers), Chinese (Incl. Mandarin, Cantonese) (8,397 speakers), and Vietnamese (7,299 speakers).

Race and Ethnicity

The 3 largest ethnic groups in Washington County, OR

White (Non-Hispanic)
388k ± 586
White (Hispanic)
64.9k ± 5.92k
Asian (Non-Hispanic)
62.2k ± 3.62k

17%

Hispanic Population

102k people

17% of the people in Washington County, OR are hispanic (102k people).

The following chart shows the 7 races represented in Washington County, OR as a share of the total population.

Non-English Speakers

Most Common Languages

Spanish
73,762 speakers (13.1%)
Chinese (Incl. Mandarin, Cantonese)
8,397 speakers (1.49%)
Vietnamese
7,299 speakers (1.3%)

26.2% of Washington County, OR citizens are speakers of a non-English language, which is higher than the national average of 21.9%. In 2018, the most common non-English language spoken in Washington County, OR was Spanish. 13.1% of the overall population of Washington County, OR are native Spanish speakers. 1.49% speak Chinese (Incl. Mandarin, Cantonese) and 1.3% speak Spanish, the next two most common languages.

Heritage

Foreign-Born Population

17%

2018 Foreign-Born Population

102k people

16.6%

2017 Foreign-Born Population

97.5k people

As of 2018, 17% of Washington County, OR residents (102k people) were born outside of the United States, which is higher than the national average of 13.7%. In 2017, the percentage of foreign-born citizens in Washington County, OR was 16.6%, meaning that the rate has been increasing.

The following chart shows the percentage of foreign-born residents in Washington County, OR compared to that of it's neighboring and parent geographies.

Age by Nativity

Median Native-Born Age

± 0.3

Median Foreign-Born Age

± 0.9

In 2018, the median age of all people in Washington County, OR was 36.9. Native-born citizens, with a median age of 35, were generally younger than than foreign-born citizens, with a median age of 42. But people in Washington County, OR are getting staying the same age. In 2017, the average age of all Washington County, OR residents was 37.

Global Diversity

The PUMS dataset is not available at the County level, so we are showing data for Oregon.

Most Common Origin

Mexico
152,733 ± 9,418 people
Vietnam
23,723 ± 3,771 people
China
21,482 ± 3,589 people

In 2018, the most common birthplace for the foreign-born residents of Oregon was Mexico, the natal country of 152,733 Oregon residents, followed by Vietnam with 23,723 and China with 21,482.

Citizenship

89.6%

2018 Citizenship

90.9%

2017 Citizenship

As of 2018, 89.6% of Washington County, OR residents were US citizens, which is lower than the national average of 93.2%. In 2017, the percentage of US citizens in Washington County, OR was 90.9%, meaning that the rate of citizenship has been decreasing.

The following chart shows US citizenship percentages in Washington County, OR compared to that of it's neighboring and parent geographies.

Military

Veterans

Most Common Service Period

Vietnam
10,343 ± 1,208
Gulf War (2001-)
6,782 ± 1,389
Gulf War (1990s)
5,854 ± 1,242

Washington County, OR has a large population of military personnel who served in Vietnam, 1.53 times greater than any other conflict.

Economy

Median household income in Washington County, OR is $83,068. In 2018, the tract with the highest Median Household Income in Washington County, OR was Census Tract 315.08 with a value of $169,709, followed by Census Tract 321.09 and Census Tract 315.13, with respective values of $158,194 and $154,570.

Males in Oregon have an average income that is 1.26 times higher than the average income of females, which is $52,914. The income inequality in Oregon (measured using the Gini index) is 0.466, which is lower than than the national average.

The economy of Washington County, OR employs 318k people. The largest industries in Washington County, OR are Manufacturing (52,194 people), Health Care & Social Assistance (41,353 people), and Retail Trade (35,036 people), and the highest paying industries are Utilities ($97,029), Management of Companies & Enterprises ($86,394), and Manufacturing ($70,907).

Wages

Median Household Income

$83,068

2018 value

± $2,967

2.62%

1 Year Growth

± 4.03%

Households in Washington County, OR have a median annual income of $83,068, which is more than the median annual income of $61,937 across the entire United States. This is in comparison to a median income of $80,946 in 2017, which represents a 2.62% annual growth.

The following chart shows how the median household income in Washington County, OR compares to that of its neighboring and parent geographies.

Wage by Gender in Common Jobs

The PUMS dataset is not available at the County level, so we are showing data for Oregon.

$66,934

Average Male Salary in Oregon

± $1,731

$52,914

Average Female Salary in Oregon

± $1,491

In 2018, full-time male employees in Oregon made 1.26 times more than female employees.

This chart shows the gender-based wage disparity in the 5 most common occupations in Oregon by number of full-time employees.

Wage by Race and Ethnicity in Common Jobs

The PUMS dataset is not available at the County level, so we are showing data for Oregon.

Highest Average Salaries by Race & Ethnicity in Oregon

Asian
$61,519 ± $5,197
White
$52,994 ± $1,122
Two or More Races
$41,469 ± $3,714

In 2018 the highest paid race/ethnicity of Oregon workers was Asian. These workers were paid 1.16 times more than White workers, who made the second highest salary of any race/ethnicity in Oregon.

This chart shows the race- and ethnicity-based wage disparities in the 5 most common occupations in Oregon by number of full-time employees.

Wage Distribution

The closest comparable wage GINI for Washington County, OR is from Oregon.

0.466

2018 Wage GINI in Oregon

0.459

2017 Wage GINI in Oregon

In 2018, the income inequality in Oregon was 0.466 according to the GINI calculation of the wage distribution. Income inequality had a 1.54% growth from 2017 to 2018, which means that wage distribution grew somewhat less even. The GINI for Oregon was lower than than the national average of 0.479. In other words, wages are distributed more evenly in Oregon in comparison to the national average.

This chart shows the number of workers in Oregon across various wage buckets compared to the national average.

Income by Location

Use the dropdown to filter by race/ethnicity.

Highest Median Household Income (Total)

Census Tract 315.08
Census Tract 321.09
Census Tract 315.13

In 2018, the tract with the highest Median Household Income (Total) in Washington County, OR was Census Tract 315.08 with a value of $169,709, followed by Census Tract 321.09 and Census Tract 315.13, with respective values of $158,194 and $154,570.

The following map shows all of the tracts in Washington County, OR colored by their Median Household Income (Total).

Poverty by Age and Gender

Females 18 - 24

Largest Demographic Living in Poverty

9.63% of the population for whom poverty status is determined in Washington County, OR (55.5k out of 576k people) live below the poverty line, a number that is lower than the national average of 13.1%. The largest demographic living in poverty are Females 18 - 24, followed by Females 25 - 34 and then Males 25 - 34.

The Census Bureau uses a set of money income thresholds that vary by family size and composition to determine who classifies as impoverished. If a family's total income is less than the family's threshold than that family and every individual in it is considered to be living in poverty.

Poverty by Race and Ethnicity

Largest Race or Ethnicity Living in Poverty

White
37,096 ± 1,453
Hispanic
19,114 ± 1,135
Other
6,846 ± 738

The most common racial or ethnic group living below the poverty line in Washington County, OR is White, followed by Hispanic and Other.

Occupations

Employment by Occupations

318k

2018 Value

± 9,650

1.98%

1 Year growth

± 4.22%

From 2017 to 2018, employment in Washington County, OR grew at a rate of 1.98%, from 311k employees to 318k employees.

The most common job groups, by number of people living in Washington County, OR, are Management Occupations (36,692 people), Office & Administrative Support Occupations (36,310 people), and Sales & Related Occupations (31,510 people). This chart illustrates the share breakdown of the primary jobs held by residents of Washington County, OR.

Most Common

The most common jobs held by residents of Washington County, OR, by number of employees, are Management Occupations (36,692 people), Office & Administrative Support Occupations (36,310 people), and Sales & Related Occupations (31,510 people).

Most Specialized

Compared to other counties, Washington County, OR has an unusually high number of residents working as Architecture & Engineering Occupations (2.84 times higher than expected), Computer & Mathematical Occupations (1.99 times), and Farming, Fishing, & Forestry Occupations (1.26 times).

Highest Paid

The highest paid jobs held by residents of Washington County, OR, by median earnings, are Computer & Mathematical Occupations ($95,157), Architecture & Engineering Occupations ($95,135), and Computer, Engineering, & Science Occupations ($91,399).

Industries

Employment by Industries

318k

2018 Value

± 9,650

1.98%

1 Year growth

± 4.22%

From 2017 to 2018, employment in Washington County, OR grew at a rate of 1.98%, from 311k employees to 318k employees.

The most common employment sectors for those who live in Washington County, OR, are Manufacturing (52,194 people), Health Care & Social Assistance (41,353 people), and Retail Trade (35,036 people). This chart shows the share breakdown of the primary industries for residents of Washington County, OR, though some of these residents may live in Washington County, OR and work somewhere else. Census data is tagged to a residential address, not a work address.

Most Common

The most common industries in Washington County, OR, by number of employees, are Manufacturing (52,194 people), Health Care & Social Assistance (41,353 people), and Retail Trade (35,036 people).

Most Specialized

Compared to other counties, Washington County, OR has an unusually high number of Management of Companies & Enterprises (3.16 times higher than expected), Manufacturing (1.69 times), and Agriculture, Forestry, Fishing & Hunting (1.35 times) industries.

Highest Paying

The highest paying industries in Washington County, OR, by median earnings, are Utilities ($97,029), Management of Companies & Enterprises ($86,394), and Manufacturing ($70,907).

Domestic Trade

Domestic Production & Consumption

Domestic production and consumption consists of products and services shipped from Oregon to other states, or from other states to Oregon.

Top Domestic Production in Dollars

In 2015, the top outbound Oregon product (by dollars) was Mixed freight with $18.5B, followed by Electronics ($13.1B) and Motorized vehicles ($12.8B).

The following chart shows the share of these products in relation to all outbound Oregon products.

Domestic Trade Growth

Showing data for Oregon.

$134B

2015 Value in Oregon

$201B

Projected 2045 Value in Oregon

49.9% growth

In 2015, total outbound Oregon trade was $134B. This is expected to increase 49.9% to $201B by 2045.

The following chart shows how the domestic outbound Oregon trade is projected to change in comparison to its neighboring states.

Interstate Trade

Interstate trade consists of products and services shipped from Oregon to other states, or from other states to Oregon.

Most Common Trade Partners

Washington
$26.5B
California
$17.6B
Minnesota
$2.94B

In 2015, the top outbound Oregon domestic partner for goods and services (by dollars) was Washington with $26.5B, followed by California with $17.6B and Minnesota and $2.94B.

The following map shows the amount of trade that Oregon shares with each state (excluding itself).

Education

In 2017, universities in Washington County, OR awarded 1,783 degrees. The student population of Washington County, OR is skewed towards women, with 1,484 male students and 3,266 female students.

Most students graduating from Universities in Washington County, OR are White (1,036 and 59.9%), followed by Hispanic or Latino (196 and 11.3%), Asian (179 and 10.4%), and Unknown (160 and 9.25%).

The largest universities in Washington County, OR by number of degrees awarded are Pacific University (1,213 and 68%), Altierus Career College-Tigard (207 and 11.6%), and Sumner College (113 and 6.34%).

The most popular majors in Washington County, OR are Medical Assistant (119 and 6.67%), Optometry (96 and 5.38%), and Clinical Psychology (95 and 5.33%).

The median tuition costs in Washington County, OR are $37,047 for private four year colleges, and $N/A and $N/A respectively, for public four year colleges for in-state students and out-of-state students.

Concentrations

Most Common

General Business Administration & Management
72 degree-majorss awarded
Kinesiology & Exercise Science
46 degree-majorss awarded
General Biological Sciences
43 degree-majorss awarded

In 2015, the most common concentation for Bachelors Degree recipients in Washington County, OR was General Business Administration & Management with 72 degree-majorss awarded.

This visualization illustrates the percentage of students graduating with a Bachelors Degree from schools in Washington County, OR according to their major.

Universities

Largest Universities by degrees awarded

Pacific University
1,213 degrees awarded
Altierus Career College-Tigard
207 degrees awarded
Sumner College
113 degrees awarded

$N/A

Median In-State Public

$37,047

Median Private

In 2017, the Washington County, OR institution with the largest number of graduating students was Pacific University with 1,213 degrees awarded.

Student Gender for Common Institutions

507

Degrees Awarded to Men

1,276

Degrees Awarded to Women

In 2017, 507 men were awarded degrees from institutions in Washington County, OR, which is 0.397 times less than the 1,276 female students who received degrees in the same year.

This chart displays the gender disparity between the top 5 institutions in Washington County, OR by degrees awarded.

Student Race and Ethnicity

Most Common Student Race or Ethnicity

White
1,036 degrees awarded
Hispanic or Latino
196 degrees awarded
Asian
179 degrees awarded

In 2017 the majority of degrees awarded at institutions in Washington County, OR were to White students. These 1,036 degrees mean that there were 5.29 times more White students then the next closest race/ethnicity group, Hispanic or Latino, with 196 degrees awarded.

Housing & Living

The median property value in Washington County, OR was $417,100 in 2018, which is 1.82 times larger than the national average of $229,700. Between 2017 and 2018 the median property value increased from $394,000 to $417,100, a 5.86% increase. The homeownership rate in Washington County, OR is 62.3%, which is lower than the national average of 63.9%. People in Washington County, OR have an average commute time of 23.8 minutes, and they commute by Drove Alone. Car ownership in Washington County, OR is approximately the same as the national average, with an average of 2 cars per household.

Housing

Property Value

$417,100

2018 Median

± $7,744

$394,000

2017 Median

± $6,438

In 2018, the median property value in Washington County, OR grew to to $417,100 from the previous year's value of $394,000.

The following charts display, first, the property values in Washington County, OR compared to it's parent and neighbor geographies and, second, owner-occupied housing units distributed between a series of property value buckets compared to the national averages for each bucket. In Washington County, OR the largest share of households have a property value in the $300k - $400k range.

Household Income

Please note that the buckets used in this visualization were not evenly distributed by ACS when publishing the data.

$83,068

Median Household Income

± $2,967

226k

Number of Households

± 7,586

In 2018, the median household income of the 226k households in Washington County, OR grew to $83,068 from the previous year's value of $80,946.

The following chart displays the households in Washington County, OR distributed between a series of income buckets compared to the national averages for each bucket. The largest share of households have an income in the $75k - $100k range.

Property Taxes

$3k+

Average Range

This chart shows the households in Washington County, OR distributed between a series of property tax buckets compared to the national averages for each bucket. In Washington County, OR the largest share of households pay taxes in the $3k+ range.

Rent vs Own

62.3%

2018 Homeownership

62.8%

2017 Homeownership

In 2018, 62.3% of the housing units in Washington County, OR were occupied by their owner. This percentage declined from the previous year's rate of 62.8%.

This percentage of owner-occupation is lower than the national average of 63.9%. This chart shows the ownership percentage in Washington County, OR compared it's parent and neighboring geographies.

Commute Time

23.8 minutes

Average Travel Time

Using averages, employees in Washington County, OR have a shorter commute time (23.8 minutes) than the normal US worker (25.7 minutes). Additionally, 1.33% of the workforce in Washington County, OR have "super commutes" in excess of 90 minutes.

The chart below shows how the median household income in Washington County, OR compares to that of it's neighboring and parent geographies.

Commuter Transportation

Most Common Method of Travel

Drove Alone
73.9%
Carpooled
8.63%
Worked At Home
7.21%

In 2018, the most common method of travel for workers in Washington County, OR was Drove Alone (73.9%), followed by those who Carpooled (8.63%) and those who Worked At Home (7.21%).

The following chart shows the number of households using each mode of transportation over time, using a logarithmic scale on the y-axis to help better show variations in the smaller means of commuting.

Transportation

Car Ownership

2 cars

Average Number

The following chart displays the households in Washington County, OR distributed between a series of car ownership buckets compared to the national averages for each bucket. The largest share of households in Washington County, OR have 2 cars, followed by 3 cars.

Health

94% of the population of Washington County, OR has health coverage, with 58.7% on employee plans, 12.2% on Medicaid, 9.68% on Medicare, 12.6% on non-group plans, and 0.836% on military or VA plans.

Per capita personal health care spending in Oregon was $8,044 in 2014. This is a 7.73% increase from the previous year ($7,467).

Primary care physicians in Washington County, OR see 1092 patients per year on average, which represents a 1.02% increase from the previous year (1081 patients). Compare this to dentists who see 1089 patients per year, and mental health providers who see 332 patients per year.

Comparing across all counties in the state, Crook County has the highest prevalence of diabetes (14.2%). Additionally, Linn County has the highest prevalence of adult obesity (35.6%)

Patient to Clinician Ratios

1,092 to 1

Patient to Primary Care Physician Ratio in Washington County, OR

Primary care physicians in Washington County, OR see an average of 1,092 patients per year. This represents a 1.02% increase from the previous year (1,081 patients).

The following chart shows how the number of patients seen by primary care physicians has been changing over time in Washington County, OR in comparison to its neighboring geographies.

Behavioral Health Conditions

Data only available at the state level.

State with the Highest Prevalence

West Virginia
8.26% of the population affected
Arkansas
8.13% of the population affected
New Hampshire
7.98% of the population affected

In 2016, West Virginia had the highest prevalence of adults with major depressive episode, with 8.26% of the population affected. The second highest is Arkansas (8.13%), followed by New Hampshire (7.98%).

The following map shows the percent of individuals with major depressive episode by state over multiple years.

Social Needs

Data only available at the state level.

Most prevalent states

California
35,798 individuals
New York
5,087 individuals
Florida
4,915 individuals

In 2017, California had the highest estimated number of chronically homeless individuals in the nation, at 35,798. New York has the second highest (5,087), followed by Florida (4,915).

The following map shows the estimated number of chronically homeless individuals by state over multiple years.

Access and Quality

Data only available at state level.

Most prevalent states

Mississippi
19.2% of adults
Texas
17.9% of adults
Louisiana
17.6% of adults

In 2016, Mississippi had the highest prevalence of adults who haven't seen a doctor in the past 12 months due to cost, at 19.2%. It is followed by Texas (17.9%) and Louisiana (17.6%).

The following map shows the prevalence of adults who haven't seen a doctor in the past 12 months due to cost by state over multiple years.

Health Care Spending

Data is only available at the state level. Showing data for Oregon.

$8,044

Total Per Capita Spending on Personal Health Care in Oregon

$4,232

Per Enrollee Private Health Insurance Spending on Personal Health Care

$7,185

Per Enrollee Medicaid Spending on Personal Health Care

$8,942

Per Enrollee Medicare Spending on Personal Health Care

Between 2013 and 2014, all personal health care spending per capita in Oregon (including private, Medicare, and Medicaid) grew 7.73%, from $7,467 to $8,044.

The following chart shows how this spending changed over time in comparison to Medicaid, Medicare, and private insurance spending, per enrollee.

Health Care Coverage

5.97%

Uninsured

58.7%

Employer Coverage

12.2%

Medicaid

9.68%

Medicare

12.6%

Non-Group

0.836%

Military or VA

Between 2016 and 2017, the percent of uninsured citizens in Washington County, OR grew by 24.6% from 4.79% to 5.97%.

The following chart shows how the percent of uninsured individuals in Washington County, OR changed over time compared with the percent of individuals enrolled in various types of health insurance.