NOTE: All figures are in 2005 dollars.
SOURCE: Historical Statistics of the U.S., 1789–1945 (1949), Statistical Abstract of the U.S., 1965 (1965), Statistical Abstract of the U.S., 1990 (1990), Statistical Abstract of the U.S., 2011 (2011), and Louis Johnston and Samuel H. Williamson, “What Was the U.S. GDP Then?” MeasuringWorth, 2011, www.measuringworth.org/usgdp.