1790 3.93 1800 5.31 1810 7.24 1820 9.64 1830 12.87 1840 17.07 1850 23.19 1860 31.44 1870 38.58 1880 50.16 1890 62.95 1900 76.0 1910 92.0 1920 105.7 1930 122.8 1940 132.2 1950 150.7