Year Years 1800 417.4 1801 417.4 1802 417.4 1803 417.4 1804 417.4 1805 417.4 1806 417.4 1807 417.4 1808 417.4 1809 417.4 1810 417.4 1811 417.4 1812 417.4 1813 417.4 1814 417.4 1815 417.4 1816 417.4 1817 417.4 1818 417.4 1819 417.4 1820 417.4 1821 417.4 1822 417.4 1823 417.4 1824 417.4 1825 417.4 1826 417.4 1827 417.4 1828 417.4 1829 417.4 1830 417.4 1831 417.4 1832 417.4 1833 417.4 1834 417.4 1835 417.4 1836 417.4 1837 417.4 1838 417.4 1839 417.4 1840 417.4 1841 417.4 1842 417.4 1843 417.4 1844 417.4 1845 417.4 1846 417.4 1847 417.4 1848 417.4 1849 417.4 1850 417.4 1851 417.4 1852 417.4 1853 417.4 1854 417.4 1855 417.4 1856 417.4 1857 417.4 1858 417.4 1859 417.4 1860 417.4 1861 417.4 1862 417.4 1863 417.4 1864 417.4 1865 417.4 1866 417.4 1867 417.4 1868 417.4 1869 417.4 1870 417.4 1871 417.4 1872 417.4 1873 417.4 1874 417.4 1875 417.4 1876 417.4 1877 417.4 1878 417.4 1879 417.4 1880 417.4 1881 417.4 1882 417.4 1883 417.4 1884 417.4 1885 417.4 1886 417.4 1887 417.4 1888 417.4 1889 417.4 1890 417.4 1891 417.4 1892 417.4 1893 417.4 1894 417.4 1895 417.4 1896 417.3 1897 417.2 1898 417.1 1899 416.8 1900 416.5 1901 416.2 1902 415.8 1903 415.3 1904 414.7 1905 414.1 1906 413.4 1907 412.6 1908 411.8 1909 411 1910 410.1 1911 409.1 1912 408.1 1913 407.1 1914 406.2 1915 405.2 1916 404.2 1917 403.2 1918 402.2 1919 401.3 1920 400.3 1921 399.3 1922 398.3 1923 397.4 1924 396.4 1925 395.4 1926 394.4 1927 393.4 1928 392.5 1929 391.5 1930 390.5 1931 385.9 1932 380.2 1933 375.7 1934 370.1 1935 365.8 1936 361.4 1937 356 1938 351.7 1939 347.4 1940 342.2 1950 286.1 1951 286.2 1952 286.4 1953 286.6 1954 286.9 1955 287.2 1956 287.1 1957 287.1 1958 286.9 1959 286.7 1960 286.5 1961 286.1 1962 285.5 1963 284.8 1964 283.5 1965 282.7 1966 281.9 1967 281 1968 279.7 1969 278.4 1970 276.8 1971 275.1 1972 273.2 1973 271.5 1974 269.6 1975 267.6 1976 265.6 1977 263.5 1978 261.3 1979 258.6 1980 255.8 1981 253.1 1982 250.4 1983 247.5 1984 244.6 1985 241.3 1986 238.3 1987 235 1988 231.8 1989 228.3 1990 224.8 1991 221.1 1992 217.1 1993 213.1 1994 208.8 1995 204.3 1996 199.8 1997 195 1998 190.3 1999 185.5 2000 180.8 2001 176.2 2002 171.4 2003 166.6 2004 161.9 2005 157.1 2006 152.8 2007 148.5 2008 144.2 2009 140 2010 135.9 2011 131.7 2012 127.9 2013 123.9