When normalizing a choropleth map, your goal is to allow for more meaningful comparisons. This video shows examples of how to achieve this.
Bureau of Labor Statistics Monthly Unemployment (latest 14 months), U.S. Bureau of Labor Statistics (BLS), Local Area Unemployment Statistics (LAUS)
USA Census Counties, Esri; U.S. Department of Commerce, Census Bureau; U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS)
ACS Median Household Income Variables - Boundaries, U.S. Census Bureau's American Community Survey (ACS) 2019-2023 5-year estimates, Table(s) B19013B, B19013C, B19013D, B19013E, B19013F, B19013G, B19013H, B19013I, B19049, B19053
ACS Housing Units by Year Built Variables - Boundaries, U.S. Census Bureau's American Community Survey (ACS) 2019-2023 5-year estimates, Table(s) B25034, B25036, B25035, B25037