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 1930 242.5 1931 253.2 1933 263.5 1934 256.7 1935 218.5 1936 212.8 1937 214.7 1938 222.2 1939 209.1 1940 190.3 1941 188.4 1942 177.2 1943 165.9 1944 180.9 1945 147.4 1946 152.9 1947 149.3 1948 145.6 1949 133 1950 106.8 1951 120.6 1952 115 1953 109.9 1954 104.7 1955 100.2 1956 95.7 1957 91.6 1958 87.7 1959 84.2 1960 81 1961 78.2 1962 75.9 1963 73.8 1964 71.9 1965 70.3 1966 68.9 1967 67.4 1968 65.8 1969 64.2 1970 62.4 1971 60.5 1972 58.7 1973 56.8 1974 54.9 1975 53.2 1976 51.4 1977 49.5 1978 47.6 1979 45.7 1980 43.8 1981 41.8 1982 40.1 1983 38.5 1984 37.1 1985 35.8 1986 34.5 1987 33.2 1988 31.9 1989 30.7 1990 29.5 1991 28.5 1992 27.8 1993 27.3 1994 26.8 1995 26.1 1996 25.2 1997 24.2 1998 23.1 1999 22.1 2000 21.3 2001 20.7 2002 20.2 2003 19.7 2004 19.1 2005 18.4 2006 17.7 2007 17.2 2008 16.7 2009 16.3 2010 16 2011 15.7 2012 15.3 2013 14.9