Year Years 1800 447.9 1801 447.9 1802 447.9 1803 447.9 1804 447.9 1805 447.9 1806 447.9 1807 447.9 1808 447.9 1809 447.9 1810 447.9 1811 447.9 1812 447.9 1813 447.9 1814 447.9 1815 447.9 1816 447.9 1817 447.9 1818 447.9 1819 447.9 1820 447.9 1821 447.9 1822 447.9 1823 447.9 1824 447.9 1825 447.9 1826 447.9 1827 447.9 1828 447.9 1829 447.9 1830 447.9 1831 447.9 1832 447.9 1833 447.9 1834 447.9 1835 447.9 1836 447.9 1837 447.9 1838 447.9 1839 447.9 1840 447.9 1841 447.9 1842 447.9 1843 447.9 1844 447.9 1845 447.9 1846 447.9 1847 447.9 1848 447.9 1849 447.9 1850 447.9 1851 447.9 1852 447.9 1853 447.9 1854 447.9 1855 447.9 1856 447.9 1857 447.9 1858 447.9 1859 447.9 1860 447.9 1861 447.9 1862 447.9 1863 447.9 1864 447.9 1865 447.9 1866 447.9 1867 447.9 1868 447.9 1869 447.9 1870 447.9 1871 447.9 1872 447.9 1873 447.9 1874 447.9 1875 447.9 1876 447.9 1877 447.9 1878 447.9 1879 447.9 1880 447.9 1881 447.9 1882 447.9 1883 447.9 1884 447.9 1885 447.9 1886 447.9 1887 447.9 1888 447.9 1889 447.9 1890 447.9 1891 447.9 1892 447.9 1893 447.9 1894 447.9 1895 447.8 1896 447.8 1897 447.6 1898 447.5 1899 447.2 1900 446.9 1901 446.5 1902 446.1 1903 445.5 1904 444.9 1905 444.3 1906 443.5 1907 442.7 1908 441.9 1909 440.9 1910 439.9 1911 438.9 1912 437.9 1913 436.8 1914 435.8 1915 434.7 1916 433.7 1917 432.6 1918 431.6 1919 430.5 1920 429.5 1921 428.4 1922 427.4 1923 426.3 1924 425.3 1925 424.2 1926 423.2 1927 422.1 1928 421.1 1929 420 1930 419 1931 417.9 1932 416.9 1933 415.8 1934 414.8 1935 413.7 1936 412.7 1937 411.6 1938 410.6 1939 409.5 1940 408.5 1941 371.6 1942 337.2 1943 304.9 1944 274.4 1945 246.7 1946 219.6 1956 88.1 1957 85.4 1958 82.7 1959 80.1 1960 77.5 1961 75.1 1962 72.9 1963 71 1964 69.2 1965 67.6 1966 66.3 1967 65.1 1968 64.1 1969 63.1 1970 62.3 1971 61.6 1972 60.8 1973 59.9 1974 59 1975 58 1976 56.8 1977 55.4 1978 53.9 1979 52.3 1980 50.6 1981 48.8 1982 47 1983 45 1984 43.1 1985 41.1 1986 39.2 1987 37.3 1988 35.6 1989 33.9 1990 32.3 1991 30.8 1992 29.4 1993 28.1 1994 26.9 1995 25.7 1996 24.5 1997 23.4 1998 22.3 1999 21.1 2000 20 2001 18.8 2002 17.7 2003 16.5 2004 15.4 2005 14.2 2006 13.2 2007 12.3 2008 11.5 2009 10.9 2010 10.4 2011 9.9 2012 9.5 2013 9.1