Year Years 1800 404.7 1801 404.7 1802 404.7 1803 404.7 1804 404.7 1805 404.7 1806 404.7 1807 404.7 1808 404.7 1809 404.7 1810 404.7 1811 404.7 1812 404.7 1813 404.7 1814 404.7 1815 404.7 1816 404.7 1817 404.7 1818 404.7 1819 404.7 1820 404.7 1821 404.7 1822 404.7 1823 404.7 1824 404.7 1825 404.7 1826 404.7 1827 404.7 1828 404.7 1829 404.7 1830 404.7 1831 404.7 1832 404.7 1833 404.7 1834 404.7 1835 404.7 1836 404.7 1837 404.7 1838 404.7 1839 404.7 1840 404.7 1841 404.7 1842 404.7 1843 404.7 1844 404.7 1845 404.7 1846 404.7 1847 404.7 1848 404.7 1849 404.7 1850 404.7 1851 404.7 1852 404.7 1853 404.7 1854 404.7 1855 404.7 1856 404.7 1857 404.7 1858 404.7 1859 404.7 1860 404.7 1861 404.7 1862 404.7 1863 404.7 1864 404.7 1865 404.7 1866 404.7 1867 404.7 1868 404.7 1869 404.7 1870 404.7 1871 404.7 1872 404.7 1873 404.7 1874 404.7 1875 404.7 1876 404.7 1877 404.7 1878 404.7 1879 404.7 1880 404.7 1881 404.7 1882 404.7 1883 404.7 1884 404.7 1885 404.7 1886 404.7 1887 404.7 1888 404.7 1889 404.7 1890 404.7 1891 404.7 1892 404.7 1893 404.7 1894 404.7 1895 404.6 1896 404.6 1897 404.5 1898 404.3 1899 404.1 1900 403.8 1901 403.5 1902 403.1 1903 402.6 1904 402 1905 401.4 1906 400.8 1907 400.1 1908 399.3 1909 398.4 1910 397.5 1911 396.6 1912 395.7 1913 394.7 1914 393.8 1915 392.8 1916 391.9 1917 390.9 1918 390 1919 389 1920 388.1 1921 387.1 1922 386.2 1923 385.2 1924 384.3 1925 383.3 1926 382.4 1927 381.4 1928 408.5 1929 408.7 1930 351 1931 383.6 1932 400.7 1933 384 1934 392.6 1935 371.5 1936 393 1937 354.8 1938 350.6 1939 336.5 1940 353.2 1941 338 1942 396.6 1943 404.1 1944 360.8 1945 372.4 1955 352 1956 343.5 1957 334.7 1958 325.8 1959 317 1960 307.8 1961 298.2 1962 288.5 1963 279.1 1964 270.4 1965 262.6 1966 256.1 1967 250.8 1968 246.6 1969 243 1970 239.8 1971 236.3 1972 232.2 1973 226.9 1974 220.3 1975 212.3 1976 203.4 1977 194.1 1978 184.6 1979 175.3 1980 166.1 1981 156.9 1982 147.3 1983 137.3 1984 127.3 1985 117.5 1986 108.5 1987 100.9 1988 94.6 1989 89.5 1990 85.1 1991 81 1992 77 1993 72.9 1994 68.6 1995 64.3 1996 60 1997 55.9 1998 51.9 1999 48.3 2000 44.8 2001 41.6 2002 38.5 2003 35.7 2004 33 2005 30.7 2006 28.6 2007 26.8 2008 25.4 2009 24.3 2010 23.5 2011 22.8 2012 22.3 2013 21.8