Census materials, economic and other data, information about the current value of old money are some of the materials accessible here.
Historical Demography
http://populstat.info
U.S. Historical Census Data Browser
http://fisher.lib.virginia.edu/collections/stats/histcensus
Statistical Resources
http://guides.lib.umich.edu/content.php?pid=117561
Statistical Abstract of the United States
http://www.census.gov/compendia/statab/index.html
Current Value of Old Money
http://www.ex.ac.uk/~RDavies/arian/current/howmuch.html
These sites have all been visited and the addresses proofread. Should you experience any problems or notice any errors, however, please contact cmartin@suffolk.edu.