Year Years 1800 507.9 1801 507.9 1802 507.9 1803 507.9 1804 507.9 1805 507.9 1806 507.9 1807 507.9 1808 507.9 1809 507.9 1810 507.9 1811 507.9 1812 507.9 1813 507.9 1814 507.9 1815 507.9 1816 507.9 1817 507.9 1818 507.9 1819 507.9 1820 507.9 1821 507.9 1822 507.9 1823 507.9 1824 507.9 1825 507.9 1826 507.9 1827 507.9 1828 507.9 1829 507.9 1830 507.9 1831 507.9 1832 507.9 1833 507.9 1834 507.9 1835 507.9 1836 507.9 1837 507.9 1838 507.9 1839 507.9 1840 507.9 1841 507.9 1842 507.9 1843 507.9 1844 507.9 1845 507.9 1846 507.9 1847 507.9 1848 507.9 1849 507.9 1850 507.9 1851 507.9 1852 507.9 1853 507.9 1854 507.9 1855 507.9 1856 507.9 1857 507.9 1858 507.9 1859 507.9 1860 507.9 1861 507.9 1862 507.9 1863 507.9 1864 507.9 1865 507.9 1866 507.9 1867 507.9 1868 507.9 1869 507.9 1870 507.9 1871 507.9 1872 507.9 1873 507.9 1874 507.9 1875 507.9 1876 507.9 1877 510.9 1878 515.4 1879 518.5 1880 521.6 1881 524.7 1882 529.3 1883 532.5 1884 535.7 1885 540.4 1886 543.6 1887 545.2 1888 546.8 1889 550.1 1890 551.7 1891 553.4 1892 555 1893 556.6 1894 559.9 1895 561.5 1896 563 1897 562.9 1898 564.4 1899 564.1 1900 565.4 1901 564.9 1902 566 1903 565.3 1904 566.2 1905 565.4 1906 566.1 1907 561.8 1908 559 1909 554.5 1910 550 1911 545.5 1912 542.6 1913 538.1 1914 533.6 1915 530.8 1916 526.4 1917 522 1918 519.2 1919 514.9 1920 510.6 1921 506.4 1922 503.6 1923 499.5 1924 495.3 1925 492.6 1926 488.5 1927 477.3 1928 464.9 1929 454.1 1930 442.3 1931 432 1932 420.7 1933 410.8 1934 399.9 1935 390.4 1936 379.9 1937 370.8 1938 360.7 1939 351.9 1940 342.2 1941 333.7 1950 352.4 1951 341.9 1952 331.7 1953 322 1954 312.5 1955 303.4 1956 294.6 1957 286.3 1958 278.6 1959 271.1 1960 263.8 1961 257 1962 250.8 1963 245.1 1964 240 1965 235.4 1966 231.7 1967 228.7 1968 226.4 1969 224.7 1970 223.6 1971 222.6 1972 221.6 1973 220.4 1974 218.9 1975 216.7 1976 214 1977 210.7 1978 207 1979 202.8 1980 198.4 1981 193.8 1982 189 1983 184 1984 178.8 1985 173.3 1986 167.6 1987 161.7 1988 155.7 1989 149.7 1990 143.7 1991 137.6 1992 131.7 1993 125.7 1994 119.9 1995 114.2 1996 108.6 1997 103.2 1998 97.9 1999 92.9 2000 88.1 2001 83.6 2002 79.2 2003 75 2004 70.9 2005 66.9 2006 63 2007 59.3 2008 55.7 2009 52.3 2010 49.1 2011 46.1 2012 43.4 2013 41.1