Year Years 1800 485.7 1801 485.7 1802 485.7 1803 485.7 1804 485.7 1805 485.7 1806 485.7 1807 485.7 1808 485.7 1809 485.7 1810 485.7 1811 485.7 1812 485.7 1813 485.7 1814 485.7 1815 485.7 1816 485.7 1817 485.7 1818 485.7 1819 485.7 1820 485.7 1821 485.7 1822 485.7 1823 485.7 1824 485.7 1825 485.7 1826 485.7 1827 485.7 1828 485.7 1829 485.7 1830 485.7 1831 485.7 1832 485.7 1833 485.7 1834 485.7 1835 485.7 1836 485.7 1837 485.7 1838 485.7 1839 485.7 1840 485.7 1841 485.7 1842 485.7 1843 485.7 1844 485.7 1845 485.7 1846 485.7 1847 485.7 1848 485.7 1849 485.7 1850 485.7 1851 485.7 1852 485.7 1853 485.7 1854 485.7 1855 485.7 1856 485.7 1857 485.7 1858 485.7 1859 485.7 1860 485.7 1861 485.7 1862 485.7 1863 485.7 1864 485.7 1865 485.7 1866 485.7 1867 485.7 1868 485.7 1869 485.7 1870 485.7 1871 485.7 1872 485.7 1873 485.7 1874 485.7 1875 485.7 1876 485.7 1877 485.7 1878 485.7 1879 485.7 1880 485.7 1881 485.7 1882 485.7 1883 485.7 1884 485.7 1885 485.7 1886 485.7 1887 485.7 1888 485.7 1889 485.7 1890 485.7 1891 485.7 1892 485.7 1893 485.7 1894 485.7 1895 485.6 1896 485.6 1897 485.4 1898 485.2 1899 485 1900 484.6 1901 484.2 1902 483.7 1903 483.1 1904 482.5 1905 481.8 1906 481 1907 480.1 1908 479.2 1909 478.1 1910 477.1 1911 476 1912 474.9 1913 473.7 1914 472.6 1915 471.4 1916 470.3 1917 469.1 1918 468 1919 466.9 1920 465.7 1921 464.6 1922 463.5 1923 462.3 1924 461.2 1925 460 1926 458.9 1927 457.8 1928 456.6 1929 455.5 1930 454.3 1931 453.2 1932 452.1 1933 450.9 1934 449.8 1935 448.6 1936 447.5 1937 446.4 1938 445.2 1939 444.1 1940 442.9 1941 439.2 1942 435.5 1943 431.8 1944 426.8 1945 423.1 1946 419.5 1947 415.9 1948 411.1 1949 407.5 1950 404 1951 400.5 1952 394.6 1953 388.3 1954 381.6 1955 374.4 1956 367 1957 359.1 1958 350.8 1959 342.7 1960 334.7 1961 326.8 1962 319 1963 311.2 1964 303.6 1965 295.9 1966 288.3 1967 280.7 1968 273.6 1969 266.8 1970 260.5 1980 232 1981 231.1 1982 230.2 1983 229.1 1984 228.3 1985 227.6 1986 227 1987 226.6 1988 226.2 1989 226 1990 225.9 1991 225.8 1992 225.9 1993 225.5 1994 225.2 1995 224.7 1996 223.8 1997 222.4 1998 220.8 1999 218.9 2000 216.7 2001 214.5 2002 212.1 2003 209.8 2004 207.1 2005 204.5 2006 200.9 2007 196.8 2008 192.3 2009 187.7 2010 182.4 2011 177.5 2012 172.6 2013 167.4