The Population of the United States

Year      Population (in millions)

1815          8.3

1825          11.0

1835          14.7

1845          19.7

1855          26.7

1865          35.2

1875          44.4

1885          55.9

1895          68.9

1905          83.2

1915          98.8

1925          114.2

1935          127.1

1945          140.1

1955          164.0

1965          190.9

1975          214.3

This data was found on the Internet at gopher://cs.muohio.edu:70/11/Data%20Series/U.S.%20Population%20Series It contains the average population of the U.S. for decades from 1800-1810 to 1960-1970. For this analysis, I took the midpoints of the intervals as the data for the year the population is measured.