combined_areas          Combined Statistical Areas (CSAs)
corebased_areas         Core-based Statistical Area (CBSAs)
counties                Data for U.S. Counties and County-Equivalent
                        Entities
noncensus               U.S. Census Region and Demographic Data
states                  Demographic Data and Census Regions of U.S.
                        States and Territories
zip_codes               Data for U.S. Cities by Zip Code
