Year Years 1800 414.9 1801 414.9 1802 414.9 1803 414.9 1804 414.9 1805 414.9 1806 414.9 1807 414.9 1808 414.9 1809 414.9 1810 414.9 1811 414.9 1812 414.9 1813 414.9 1814 414.9 1815 414.9 1816 414.9 1817 414.9 1818 414.9 1819 414.9 1820 414.9 1821 414.9 1822 414.9 1823 414.9 1824 414.9 1825 414.9 1826 414.9 1827 414.9 1828 414.9 1829 414.9 1830 414.9 1831 414.9 1832 414.9 1833 414.9 1834 414.9 1835 414.9 1836 414.9 1837 414.9 1838 414.9 1839 414.9 1840 414.9 1841 414.9 1842 414.9 1843 414.9 1844 414.9 1845 414.9 1846 414.9 1847 414.9 1848 414.9 1849 414.9 1850 414.9 1851 414.9 1852 414.9 1853 414.9 1854 414.9 1855 414.9 1856 414.9 1857 414.9 1858 414.9 1859 414.9 1860 414.9 1861 414.9 1862 414.9 1863 414.9 1864 414.9 1865 414.9 1866 414.9 1867 414.9 1868 414.9 1869 414.9 1870 414.9 1871 414.9 1872 414.9 1873 414.9 1874 414.9 1875 414.9 1876 414.9 1877 414.9 1878 414.9 1879 414.9 1880 414.9 1881 414.9 1882 414.9 1883 414.9 1884 414.9 1885 414.9 1886 414.9 1887 414.9 1888 414.9 1889 414.9 1890 414.9 1891 414.9 1892 414.9 1893 414.9 1894 414.9 1895 414.8 1896 414.8 1897 414.7 1898 414.5 1899 414.3 1900 414 1901 413.6 1902 413.2 1903 412.7 1904 412.2 1905 411.6 1906 410.9 1907 410.1 1908 409.3 1909 408.4 1910 407.5 1911 406.6 1912 405.6 1913 404.7 1914 403.7 1915 402.7 1916 401.7 1917 400.8 1918 399.8 1919 398.8 1920 397.9 1921 396.9 1922 395.9 1923 394.9 1924 393.9 1925 393 1926 392 1927 391 1928 390.1 1929 389.1 1930 388.1 1931 387.1 1932 386.2 1933 385.2 1934 384.2 1935 383.2 1936 382.3 1937 381.3 1938 380.3 1939 379.4 1940 378.4 1941 377.4 1951 262.5 1952 260.4 1953 258.1 1954 256.1 1955 254.1 1956 251.8 1957 249.8 1958 247.8 1959 245.7 1960 243.8 1961 241.5 1962 239.3 1963 236.8 1964 234.1 1965 231.4 1966 228.2 1967 224.9 1968 221.4 1969 217.7 1970 214.2 1971 210.7 1972 207.1 1973 203.2 1974 199.3 1975 195.1 1976 190.8 1977 186.4 1978 182.4 1979 179.4 1980 177.6 1981 176.8 1982 176.8 1983 177.3 1984 177.3 1985 176.7 1986 175.5 1987 173.4 1988 171.1 1989 168.9 1990 167 1991 165.5 1992 164.3 1993 163.2 1994 161.7 1995 159.5 1996 156.3 1997 152.1 1998 146.5 1999 139.6 2000 131.5 2001 122.7 2002 113.8 2003 105.4 2004 97.5 2005 90.1 2006 83.4 2007 77.1 2008 71.2 2009 66.2 2010 61.4 2011 57.2 2012 53.9 2013 51.8