The poverty estimates are model-based estimates from the U.S. Census Bureau's Small Area Income and Poverty Estimate (SAIPE) program. Detailed documentation and information about the methodology used to generate the estimates can be found on the Census Bureau's Small Area Income and Poverty Estimates web page.
U.S. Census Bureau, 1990, 2000, 2010, and 2020 Censuses of Population; and 2021 population estimates program.
Unemployment and Median Household Income
The county and State unemployment rates are from the Bureau of Labor Statistics (BLS) Local Area Unemployment Statistics (LAUS) program. More information about the methodology used to generate these estimates can be found here on the BLS Local Area Unemployment Statistics web page.
Median household is from the U.S. Census Bureau's Small Area Income and Poverty Estimate (SAIPE) program. More information can be found on the Census Bureau's Small Area Income and Poverty Estimates web page.
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Note that for 1970 and 1980, the share of adults with less than high school includes those who had not completed the 12th grade. In 1990, 2000, and 2016-2020, the share includes those who did not receive a high school diploma or its equivalent (such as a GED).
The 1970, 1980, 1990, and 2000 education data are from U.S. Census Bureau, decennial Censuses of Population.
The data for 2016-2020 are a 5-year average (in order to have data for all counties) from the Census Bureau's American Community Survey.