Year Years 1800 407.2 1801 407.2 1802 407.2 1803 407.2 1804 407.2 1805 407.2 1806 407.2 1807 407.2 1808 407.2 1809 407.2 1810 407.2 1811 407.2 1812 407.2 1813 407.2 1814 407.2 1815 407.2 1816 407.2 1817 407.2 1818 407.2 1819 407.2 1820 407.2 1821 407.2 1822 407.2 1823 407.2 1824 407.2 1825 407.2 1826 407.2 1827 407.2 1828 407.2 1829 407.2 1830 407.2 1831 407.2 1832 407.2 1833 407.2 1834 407.2 1835 407.2 1836 407.2 1837 407.2 1838 407.2 1839 407.2 1840 407.2 1841 407.2 1842 407.2 1843 407.2 1844 407.2 1845 407.2 1846 407.2 1847 407.2 1848 407.2 1849 407.2 1850 407.2 1851 407.2 1852 407.2 1853 407.2 1854 407.2 1855 407.2 1856 407.2 1857 407.2 1858 407.2 1859 407.2 1860 407.2 1861 407.2 1862 407.2 1863 407.2 1864 407.2 1865 407.2 1866 407.2 1867 407.2 1868 407.2 1869 407.2 1870 407.2 1871 407.2 1872 407.2 1873 407.2 1874 407.2 1875 407.2 1876 407.2 1877 407.2 1878 407.2 1879 407.2 1880 407.2 1881 407.2 1882 407.2 1883 407.2 1884 407.2 1885 407.2 1886 407.2 1887 407.2 1888 407.2 1889 407.2 1890 407.2 1891 407.2 1892 407.2 1893 407.2 1894 407.2 1895 407.2 1896 407.1 1897 407 1898 406.9 1899 406.6 1900 406.4 1901 406 1902 405.6 1903 405.1 1904 404.6 1905 404 1906 403.3 1907 402.6 1908 401.8 1909 400.9 1910 400 1911 399.1 1912 398.2 1913 397.2 1914 396.2 1915 395.3 1916 394.3 1917 393.4 1918 392.4 1919 391.5 1920 390.5 1921 389.6 1922 388.6 1923 387.6 1924 386.7 1925 385.7 1926 384.8 1927 383.8 1928 382.9 1929 381.9 1930 381 1931 380 1932 379.1 1933 378.1 1934 377.1 1935 376.2 1936 375.2 1937 374.3 1938 373.3 1939 372.4 1940 371.4 1941 370.4 1950 344 1951 343.1 1952 342.6 1953 342.2 1954 341.4 1955 340.2 1956 338.9 1957 337.6 1958 335.7 1959 333.3 1960 330 1961 325.9 1962 321.1 1963 315.5 1964 309.4 1965 302.9 1966 296.3 1967 289.7 1968 283 1969 276.5 1970 270.6 1971 264.9 1972 259.3 1973 253.6 1974 248.2 1975 242.5 1976 236.7 1977 230.6 1978 224.2 1979 217.7 1980 211.1 1981 204.4 1982 197.7 1983 191.1 1984 184.5 1985 177.8 1986 170.9 1987 163.8 1988 156.7 1989 149.5 1990 142.3 1991 135.3 1992 128.4 1993 121.8 1994 115.4 1995 109.4 1996 103.5 1997 97.9 1998 92.3 1999 87 2000 81.9 2001 77 2002 72.4 2003 68.1 2004 64 2005 60.3 2006 56.7 2007 53.5 2008 50.4 2009 47.7 2010 45.3 2011 43.2 2012 41.3 2013 39.7