Consult authoritative federal and state websites and other organizations to locate statistical information on a topic of your choice. The follow sites are relevant examples.
A standard source for the quantitative facts of American history. Users can search and download statistics and create customized tables and spreadsheets reflecting their own particular areas of interest.
"The Minnesota State Demographic Center analyzes and distributes data from state, U.S. Census Bureau, and other sources." Especially helpful is the A-Z subjects list.