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 434.3 1925 429.4 1926 425.8 1927 420.8 1928 417.2 1929 412.4 1930 408.9 1931 405.4 1932 400.7 1933 397.2 1934 392.6 1935 389.2 1936 384.6 1937 381.3 1938 376.8 1939 373.5 1940 369.1 1941 365.9 1942 361.5 1943 358.3 1944 349.6 1945 342.1 1946 333.7 1947 326.4 1948 318.2 1949 311.2 1950 303.3 1951 301.5 1961 283.2 1962 270 1963 257.2 1964 245.1 1965 233.1 1966 221.6 1967 210.1 1968 199.1 1969 188.8 1970 178.9 1971 169.5 1972 160.3 1973 151.2 1974 142.2 1975 133.1 1976 124.2 1977 115.6 1978 107.6 1979 100.2 1980 93.5 1981 87.6 1982 82.3 1983 77.3 1984 72.7 1985 68.3 1986 64.4 1987 60.8 1988 57.6 1989 54.8 1990 52.2 1991 49.7 1992 47.4 1993 45.2 1994 43 1995 40.8 1996 38.6 1997 36.5 1998 34.5 1999 32.6 2000 30.8 2001 29 2002 27.3 2003 25.8 2004 24.4 2005 23 2006 21.7 2007 20.5 2008 19.4 2009 18.3 2010 17.4 2011 16.5 2012 15.8 2013 15.2