"year" "population" 1790 3.929214 1800 5.308483 1810 7.239881 1820 9.638453 1830 12.860702 1840 17.063353 1850 23.191876 1860 31.443321 1870 38.558371 1880 50.189209 1890 62.979766 1900 76.212168 1910 92.228496 1920 106.021537 1930 123.202624 1940 132.164569 1950 151.325798 1960 179.323175 1970 203.302031 1980 226.542199 1990 248.709873 2000 281.421906