Aroostook County, ME

County

Add Comparison

2019 Population

67,809

0.674% 1-year decline

US Senator

Susan Collins

Republican Party

US Senator

Angus King

Independent Party

2019 Median Age

0.84% 1-year increase

2019 Poverty Rate

16.1%

6.29% 1-year decrease

2019 Median Household Income

$41,123

3.26% 1-year growth

2019 Median Property Value

$99,600

1.63% 1-year growth

2019 Employed Population

29,593

0.511% 1-year decline

About

In 2019, Aroostook County, ME had a population of 67.8k people with a median age of 48 and a median household income of $41,123. Between 2018 and 2019 the population of Aroostook County, ME declined from 68,269 to 67,809, a −0.674% decrease and its median household income grew from $39,824 to $41,123, a 3.26% increase.

The 5 largest ethnic groups in Aroostook County, ME are White (Non-Hispanic) (94.1%), American Indian & Alaska Native (Non-Hispanic) (1.86%), Two+ (Non-Hispanic) (1.38%), Black or African American (Non-Hispanic) (0.939%), and White (Hispanic) (0.808%). 0% of the households in Aroostook County, ME speak a non-English language at home as their primary language.

98.6% of the residents in Aroostook County, ME are U.S. citizens.

The largest universities in Aroostook County, ME are University of Maine at Fort Kent (257 degrees awarded in 2019), Northern Maine Community College (192 degrees), and University of Maine at Presque Isle (179 degrees).

In 2019, the median property value in Aroostook County, ME was $99,600, and the homeownership rate was 72%. Most people in Aroostook County, ME drove alone to work, and the average commute time was 17.3 minutes. The average car ownership in Aroostook County, ME was 2 cars per household.

Aroostook County, ME borders Penobscot County, ME, Piscataquis County, ME, Somerset County, ME, and Washington County, ME.

About the photo: Moose in Mist, Limestone, ME

Photo by U.S. Fish and Wildlife Service Northeast Region

United States Maine

Diversity

Aroostook County, ME is home to a population of 67.8k people, from which 98.6% are citizens. As of 2019, 4.39% of Aroostook County, ME residents were born outside of the country (2.98k people).

In 2019, there were 50.5 times more White (Non-Hispanic) residents (63.8k people) in Aroostook County, ME than any other race or ethnicity. There were 1.26k American Indian & Alaska Native (Non-Hispanic) and 935 Two+ (Non-Hispanic) residents, the second and third most common ethnic groups.

Race and Ethnicity

The 3 largest ethnic groups in Aroostook County, ME

White (Non-Hispanic)
63.8k ± 2
American Indian & Alaska Native (Non-Hispanic)
1.26k ± 103
Two+ (Non-Hispanic)
935 ± 151

1.23%

Hispanic Population

834 people

1.23% of the people in Aroostook County, ME are hispanic (834 people).

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

Heritage

Foreign-Born Population

4.39%

2019 Foreign-Born Population

2.98k people

4.4%

2018 Foreign-Born Population

3.01k people

As of 2019, 4.39% of Aroostook County, ME residents (2.98k people) were born outside of the United States, which is lower than the national average of 13.7%. In 2018, the percentage of foreign-born citizens in Aroostook County, ME was 4.4%, meaning that the rate has been decreasing.

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

Age by Nativity

Median Native-Born Age

± 0.3

Median Foreign-Born Age

± 2

In 2019, the median age of all people in Aroostook County, ME was 48. Native-born citizens, with a median age of 47, were generally younger than foreign-born citizens, with a median age of 61. But people in Aroostook County, ME are getting getting older. In 2018, the average age of all Aroostook County, ME residents was 48.

Global Diversity

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

Most Common Origin

Canada
9,379 ± 2,369 people
Philippines
3,069 ± 1,359 people
Germany
2,577 ± 1,245 people

In 2019, the most common birthplace for the foreign-born residents of Maine was Canada, the natal country of 9,379 Maine residents, followed by Philippines with 3,069 and Germany with 2,577.

Citizenship

98.6%

2019 Citizenship

98.4%

2018 Citizenship

As of 2019, 98.6% of Aroostook County, ME residents were US citizens, which is higher than the national average of 93.4%. In 2018, the percentage of US citizens in Aroostook County, ME was 98.4%, meaning that the rate of citizenship has been increasing.

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

Military

Veterans

Most Common Service Period

Vietnam
2,269 ± 209
Gulf War (1990s)
803 ± 160
Gulf War (2001-)
747 ± 136

Aroostook County, ME has a large population of military personnel who served in Vietnam, 2.83 times greater than any other conflict.

COVID-19

Daily New Cases by Date

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

Y-Axis

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

View Full Dashboard

Unemployment Insurance Claims

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

This chart shows weekly unemployment insurance claims in Maine (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.

View Full Dashboard

Employment by Industry Sector

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

Y-Axis

8.45%

Year-over-year growth

Employment change between May 2020 and May 2021

As of May 2021, there are 145M people employed in Maine. This represents a 8.45% increase in employment when compared to May 2020.

The following chart shows monthly employment numbers for each industry sector in Maine.

View Full Dashboard

Community Mobility

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

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

View Full Dashboard

Economy

Median household income in Aroostook County, ME is $41,123. In 2019, the tract with the highest median household income in Aroostook County, ME was Census Tract 9511 with a value of $56,579, followed by Census Tract 9519 and Census Tract 9506, with respective values of $50,250 and $49,693.

Males in Maine have an average income that is 1.25 times higher than the average income of females, which is $48,698. The income inequality in Maine (measured using the Gini index) is 0.439, which is lower than than the national average.

The economy of Aroostook County, ME employs 29.6k people. The largest industries in Aroostook County, ME are Health Care & Social Assistance (5,918 people), Retail Trade (3,676 people), and Manufacturing (3,050 people), and the highest paying industries are Utilities ($57,604), Public Administration ($46,504), and Wholesale Trade ($44,448).

Wages

Median Household Income

$41,123

2019 value

± $1,381

3.26%

1 Year Growth

± 4.39%

Households in Aroostook County, ME have a median annual income of $41,123, which is less than the median annual income of $65,712 across the entire United States. This is in comparison to a median income of $39,824 in 2018, which represents a 3.26% annual growth.

The following chart shows how the median household income in Aroostook County, ME 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 Maine.

$60,757

Average Male Salary in Maine

± $2,655

$48,698

Average Female Salary in Maine

± $2,118

In 2019, full-time male employees in Maine made 1.25 times more than female employees.

This chart shows the gender-based wage disparity in the 5 most common occupations in Maine 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 Maine.

Highest Average Salaries by Race & Ethnicity in Maine

Asian
$52,638 ± $17,823
White
$47,033 ± $1,536
American Indian and Alaska Native tribes specified; or American Indian or Alaska Native, not specified and no other races
$36,945 ± $33,395

In 2019 the highest paid race/ethnicity of Maine workers was Asian. These workers were paid 1.12 times more than White workers, who made the second highest salary of any race/ethnicity in Maine.

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

Wage Distribution

The closest comparable wage GINI for Aroostook County, ME is from Maine.

0.439

2019 Wage GINI in Maine

0.442

2018 Wage GINI in Maine

In 2019, the income inequality in Maine was 0.439 according to the GINI calculation of the wage distribution. Income inequality had a 0.718% decline from 2018 to 2019, which means that wage distribution grew somewhat more even. The GINI for Maine was lower than than the national average of 0.478. In other words, wages are distributed more evenly in Maine in comparison to the national average.

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

Income by Location

Use the dropdown to filter by race/ethnicity.

Race/Ethnicity

Highest Median Household Income (Total)

Census Tract 9511
Census Tract 9519
Census Tract 9506

In 2019, the tract with the highest Median Household Income (Total) in Aroostook County, ME was Census Tract 9511 with a value of $56,579, followed by Census Tract 9519 and Census Tract 9506, with respective values of $50,250 and $49,693.

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

Poverty by Age and Gender

Females 55 - 64

Largest Demographic Living in Poverty

16.1% of the population for whom poverty status is determined in Aroostook County, ME (10.5k out of 65.6k people) live below the poverty line, a number that is higher than the national average of 12.3%. The largest demographic living in poverty are Females 55 - 64, followed by Females 25 - 34 and then Males 55 - 64.

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
9,477 ± 517
Native American
505 ± 87
Black
242 ± 174

The most common racial or ethnic group living below the poverty line in Aroostook County, ME is White, followed by Native American and Black.

Occupations

Employment by Occupations

29.6k

2019 Value

± 888

−0.511%

1 Year decline

± 4.22%

From 2018 to 2019, employment in Aroostook County, ME declined at a rate of −0.511%, from 29.7k employees to 29.6k employees.

The most common job groups, by number of people living in Aroostook County, ME, are Office & Administrative Support Occupations (3,503 people), Sales & Related Occupations (2,862 people), and Management Occupations (2,170 people). This chart illustrates the share breakdown of the primary jobs held by residents of Aroostook County, ME.

Most Common

The most common jobs held by residents of Aroostook County, ME, by number of employees, are Office & Administrative Support Occupations (3,503 people), Sales & Related Occupations (2,862 people), and Management Occupations (2,170 people).

Most Specialized

Compared to other counties, Aroostook County, ME has an unusually high number of residents working as Farming, Fishing, & Forestry Occupations (4.9 times higher than expected), Community & Social Service Occupations (2 times), and Healthcare Support Occupations (1.65 times).

Highest Paid

The highest paid jobs held by residents of Aroostook County, ME, by median earnings, are Law Enforcement Workers Including Supervisors ($75,410), Health Diagnosing & Treating Practitioners & Other Technical Occupations ($64,775), and Architecture & Engineering Occupations ($63,333).

Industries

Employment by Industries

29.6k

2019 Value

± 888

−0.511%

1 Year decline

± 4.22%

From 2018 to 2019, employment in Aroostook County, ME declined at a rate of −0.511%, from 29.7k employees to 29.6k employees.

The most common employment sectors for those who live in Aroostook County, ME, are Health Care & Social Assistance (5,918 people), Retail Trade (3,676 people), and Manufacturing (3,050 people). This chart shows the share breakdown of the primary industries for residents of Aroostook County, ME, though some of these residents may live in Aroostook County, ME and work somewhere else. Census data is tagged to a residential address, not a work address.

Most Common

The most common industries in Aroostook County, ME, by number of employees, are Health Care & Social Assistance (5,918 people), Retail Trade (3,676 people), and Manufacturing (3,050 people).

Most Specialized

Compared to other counties, Aroostook County, ME has an unusually high number of Agriculture, Forestry, Fishing & Hunting (4.93 times higher than expected), Health Care & Social Assistance (1.44 times), and Public Administration (1.43 times) industries.

Highest Paying

The highest paying industries in Aroostook County, ME, by median earnings, are Utilities ($57,604), Public Administration ($46,504), and Wholesale Trade ($44,448).

Domestic Trade

Domestic Production & Consumption

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

Top Domestic Production in Dollars

In 2018, the top outbound Maine product (by dollars) was Mixed freight with $8.2B, followed by Gasoline ($5.03B) and Newsprint/paper ($4.23B).

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

Domestic Trade Growth

Showing data for Maine.

$56.2B

2018 Value in Maine

$103B

Projected 2045 Value in Maine

83.9% growth

In 2018, total outbound Maine trade was $56.2B. This is expected to increase 83.9% to $103B by 2045.

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

Interstate Trade

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

Most Common Trade Partners

In 2018, the top outbound Maine domestic partner for goods and services (by dollars) was New Hampshire with $5.75B, followed by Massachusetts with $5.7B and New York and $3.33B.

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

Civics

In the 2016 presidential election, the popular vote in Aroostook County, ME went to Donald J. Trump with 55.3% of the vote. The runner-up was Hillary Rodham Clinton (38.1%), followed by Other (6.53%). The most partisan county was Cumberland County, ME with 59.9% of the vote going to Hillary Rodham Clinton running for the Democratic Party.

Susan Collins and Angus King are the senators currently representing the state of Maine. In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

Maine is currently represented by 2 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

Donald J. Trump (55.3%)
Republican Party
Hillary Rodham Clinton (38.1%)
Democratic Party
Other (6.53%)
Other Party

In the 2016 presidential election, the popular vote in Maine went to Donald J. Trump with 55.3% of the vote. The runner-up was Hillary Rodham Clinton (38.1%), followed by Other (6.53%).

The following chart shows the popular vote results in Maine 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 Maine.

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

Donald J. Trump

Popular Vote for Aroostook County, ME

55.3% for the Republican Party

Most Partisan Counties in Maine

Cumberland County, ME
59.9% for Hillary Rodham Clinton (Democratic Party)
Piscataquis County, ME
58.9% for Donald J. Trump (Republican Party)
Somerset County, ME
57.6% for Donald J. Trump (Republican Party)

In the 2016 presidential election, the most partisan county in Maine was Cumberland County, ME with 59.9% of the vote going to Hillary Rodham Clinton running for the Democratic Party.

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

US Senators from Maine

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

Susan Collins

Senator from Maine

Assumed office on January 3, 1997

Angus King

Senator from Maine

Assumed office on January 3, 2013

Susan Collins and Angus King are the senators currently representing Maine.

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 Maine over time, excluding special elections, colored by their political party.

US Representatives from Maine

Maine is currently represented by 2 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 Maine have changed over time starting in 2008.

Education

In 2019, universities in Aroostook County, ME awarded 628 degrees. The student population of Aroostook County, ME is skewed towards women, with 1,382 male students and 2,481 female students.

Most students graduating from Universities in Aroostook County, ME are White (522 and 88.3%), followed by Black or African American (19 and 3.21%), Hispanic or Latino (13 and 2.2%), and Unknown (13 and 2.2%).

The largest universities in Aroostook County, ME by number of degrees awarded are University of Maine at Fort Kent (257 and 40.9%), Northern Maine Community College (192 and 30.6%), and University of Maine at Presque Isle (179 and 28.5%).

The most popular majors in Aroostook County, ME are Nursing School (178 and 28.3%), General Business (65 and 10.4%), and Liberal Arts & Sciences (62 and 9.87%).

The median tuition cost in Aroostook County, ME for a public four year colleges is $7,170 for in-state students and $11,460 for out-of-state students.

Concentrations

Most Common

Nursing School
178 degree-majorss awarded
General Business
65 degree-majorss awarded
Liberal Arts & Sciences
25 degree-majorss awarded

In 2019, the most common concentation for Bachelors Degree recipients in Aroostook County, ME was Nursing School with 178 degrees awarded.

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

Universities

Largest Universities by degrees awarded

University of Maine at Fort Kent
257 degrees awarded
Northern Maine Community College
192 degrees awarded
University of Maine at Presque Isle
179 degrees awarded

$7,170

Median In-State Public

In 2019, the Aroostook County, ME institution with the largest number of graduating students was University of Maine at Fort Kent with 257 degrees awarded.

Student Gender for Common Institutions

232

Degrees Awarded to Men

396

Degrees Awarded to Women

In 2019, 232 men were awarded degrees from institutions in Aroostook County, ME, which is 0.586 times less than the 396 female students who received degrees in the same year.

This chart displays the gender disparity between the institutions in Aroostook County, ME by degrees awarded.

Student Race and Ethnicity

Most Common Student Race or Ethnicity

White
522 degrees awarded
Black or African American
19 degrees awarded
Hispanic or Latino
13 degrees awarded

In 2019 the most common race/ethnicity group awarded degrees at institutions in Aroostook County, ME was White students. These 522 degrees mean that there were 27.5 times more degrees awarded to White students then the next closest race/ethnicity group, Black or African American, with 19 degrees awarded.

Housing & Living

The median property value in Aroostook County, ME was $99,600 in 2019, which is 0.414 times smaller than the national average of $240,500. Between 2018 and 2019 the median property value increased from $98,000 to $99,600, a 1.63% increase. The homeownership rate in Aroostook County, ME is 72%, which is higher than the national average of 64.1%. People in Aroostook County, ME have an average commute time of 17.3 minutes, and they drove alone to work. Car ownership in Aroostook County, ME is approximately the same as the national average, with an average of 2 cars per household.

Housing

Property Value

$99,600

2019 Median

± $2,308

$98,000

2018 Median

± $2,445

In 2019, the median property value in Aroostook County, ME grew to to $99,600 from the previous year's value of $98,000.

The following charts display, first, the property values in Aroostook County, ME 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 Aroostook County, ME the largest share of households have a property value in the $100k - $125k range.

Household Income

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

$41,123

Median Household Income

± $1,381

29.5k

Number of Households

± 865

In 2019, the median household income of the 29.5k households in Aroostook County, ME grew to $41,123 from the previous year's value of $39,824.

The following chart displays the households in Aroostook County, ME 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

$800 - $1,499

Average Range

This chart shows the households in Aroostook County, ME distributed between a series of property tax buckets compared to the national averages for each bucket. In Aroostook County, ME the largest share of households pay taxes in the $800 - $1,499 range.

Rent vs Own

72%

2019 Homeownership

71.7%

2018 Homeownership

In 2019, 72% of the housing units in Aroostook County, ME were occupied by their owner. This percentage grew from the previous year's rate of 71.7%.

This percentage of owner-occupation is higher than the national average of 64.1%. This chart shows the ownership percentage in Aroostook County, ME compared it's parent and neighboring geographies.

Commute Time

17.3 minutes

Average Travel Time

Using averages, employees in Aroostook County, ME have a shorter commute time (17.3 minutes) than the normal US worker (25.5 minutes). Additionally, 1.47% of the workforce in Aroostook County, ME have "super commutes" in excess of 90 minutes.

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

Commuter Transportation

Most Common Commute in 2019

Drove Alone (80.3%)
Carpooled (9.54%)
Worked At Home (4.28%)

In 2019, 80.3% of workers in Aroostook County, ME drove alone to work, followed by those who carpooled to work (9.54%) and those who worked at home (4.28%).

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 Aroostook County, ME distributed between a series of car ownership buckets compared to the national averages for each bucket. The largest share of households in Aroostook County, ME have 2 cars, followed by false.

Health

91.6% of the population of Aroostook County, ME has health coverage, with 37.8% on employee plans, 22.6% on Medicaid, 13.3% on Medicare, 14.6% on non-group plans, and 3.22% on military or VA plans.

Per capita personal health care spending in Maine was $9,531 in 2014. This is a 4.36% increase from the previous year ($9,133).

Primary care physicians in Aroostook County, ME see 907 patients per year on average, which represents a 3.51% decrease from the previous year (940 patients). Compare this to dentists who see 1676 patients per year, and mental health providers who see 177 patients per year.

Comparing across all counties in the state, Aroostook County has the highest prevalence of diabetes (15%). Additionally, Aroostook County has the highest prevalence of adult obesity (37.7%)

Patient to Clinician Ratios

907 to 1

Patient to Primary Care Physician Ratio in Aroostook County, ME

Primary care physicians in Aroostook County, ME see an average of 907 patients per year. This represents a 3.51% decrease from the previous year (940 patients).

The following chart shows how the number of patients seen by primary care physicians has been changing over time in Aroostook County, ME 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 Maine.

$9,531

Total Per Capita Spending on Personal Health Care in Maine

$5,015

Per Enrollee Private Health Insurance Spending on Personal Health Care

$7,504

Per Enrollee Medicaid Spending on Personal Health Care

$9,325

Per Enrollee Medicare Spending on Personal Health Care

Between 2013 and 2014, all personal health care spending per capita in Maine (including private, Medicare, and Medicaid) grew 4.36%, from $9,133 to $9,531.

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

Health Care Coverage

8.45%

Uninsured

37.8%

Employer Coverage

22.6%

Medicaid

13.3%

Medicare

14.6%

Non-Group

3.22%

Military or VA

Between 2018 and 2019, the percent of uninsured citizens in Aroostook County, ME declined by 6.05% from 8.99% to 8.45%.

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