Created by William and Mary students for Econ 449, American Economic Mobility Over Two Centuries. Source for the underlying data: Gibson and Young, 2002. Historical Census Statistics on Population Totals by Race, 1790 to 1990 and by Hispanic Origin, 1970 to 1990, for the United States, Regions, Divisions and States. Working Paper No. 56, Population Division of the U.S. Census Bureau. Retrieved from