Year Years 1800 460.2 1801 460.2 1802 460.2 1803 460.2 1804 460.2 1805 460.2 1806 460.2 1807 460.2 1808 460.2 1809 460.2 1810 460.2 1811 460.2 1812 460.2 1813 460.2 1814 460.2 1815 460.2 1816 460.2 1817 460.2 1818 460.2 1819 460.2 1820 460.2 1821 460.2 1822 460.2 1823 460.2 1824 460.2 1825 460.2 1826 460.2 1827 460.2 1828 460.2 1829 460.2 1830 460.2 1831 460.2 1832 460.2 1833 460.2 1834 460.2 1835 460.2 1836 460.2 1837 460.2 1838 460.2 1839 460.2 1840 460.2 1841 460.2 1842 460.2 1843 460.2 1844 460.2 1845 460.2 1846 460.2 1847 460.2 1848 460.2 1849 460.2 1850 460.2 1851 460.2 1852 460.2 1853 460.2 1854 460.2 1855 460.2 1856 460.2 1857 460.2 1858 460.2 1859 460.2 1860 460.2 1861 460.2 1862 460.2 1863 460.2 1864 460.2 1865 460.2 1866 460.2 1867 460.2 1868 460.2 1869 460.2 1870 460.2 1871 460.2 1872 460.2 1873 460.2 1874 460.2 1875 460.2 1876 460.2 1877 460.2 1878 460.2 1879 460.2 1880 460.2 1881 460.2 1882 460.2 1883 460.2 1884 460.2 1885 460.2 1886 460.2 1887 460.2 1888 460.2 1889 460.2 1890 460.2 1891 460.2 1892 460.2 1893 460.2 1894 460.2 1895 460.2 1896 460.1 1897 460 1898 459.8 1899 459.5 1900 459.2 1901 458.8 1902 458.4 1903 457.8 1904 457.2 1905 456.5 1906 455.8 1907 454.9 1908 454 1909 453.1 1910 452.1 1911 451 1912 449.9 1913 448.9 1914 447.8 1915 446.7 1916 445.6 1917 444.6 1918 443.5 1919 442.4 1920 441.3 1921 440.2 1922 439.1 1923 438.1 1924 437 1925 435.9 1926 434.8 1927 433.8 1928 432.7 1929 431.6 1930 430.5 1931 429.4 1932 428.4 1933 427.3 1934 426.2 1935 425.1 1936 424 1937 422.9 1938 421.9 1939 420.8 1940 419.7 1941 418.6 1942 417.6 1943 416.5 1944 415.4 1945 414.3 1946 410.7 1956 390 1957 383.2 1958 375.9 1959 369.1 1960 362.8 1961 356.1 1962 349.9 1963 343.9 1964 338.3 1965 332.2 1966 326.3 1967 320.5 1968 314.4 1969 308.4 1970 302.2 1971 295.9 1972 289.3 1973 282.6 1974 276.2 1975 269.5 1976 262.9 1977 256.2 1978 249.8 1979 243.6 1980 237.3 1981 230.9 1982 224.2 1983 217.3 1984 210.2 1985 203.1 1986 196 1987 189.1 1988 182.4 1989 176 1990 169.8 1991 163.7 1992 158.1 1993 152.6 1994 147.3 1995 142.2 1996 137.3 1997 132.5 1998 127.8 1999 123.4 2000 119 2001 114.6 2002 110.3 2003 106.2 2004 102.2 2005 98.4 2006 94.6 2007 91.1 2008 87.8 2009 84.6 2010 81.7 2011 79 2012 76.4 2013 73.8