Year Years 1800 422.6 1801 422.6 1802 422.6 1803 422.6 1804 422.6 1805 422.6 1806 422.6 1807 422.6 1808 422.6 1809 422.6 1810 422.6 1811 422.6 1812 422.6 1813 422.6 1814 422.6 1815 422.6 1816 422.6 1817 422.6 1818 422.6 1819 422.6 1820 422.6 1821 422.6 1822 422.6 1823 422.6 1824 422.6 1825 422.6 1826 422.6 1827 422.6 1828 422.6 1829 422.6 1830 422.6 1831 422.6 1832 422.6 1833 422.6 1834 422.6 1835 422.6 1836 422.6 1837 422.6 1838 422.6 1839 422.6 1840 422.6 1841 422.6 1842 422.6 1843 422.6 1844 422.6 1845 422.6 1846 422.6 1847 422.6 1848 422.6 1849 422.6 1850 422.6 1851 422.6 1852 422.6 1853 422.6 1854 422.6 1855 422.6 1856 422.6 1857 422.6 1858 422.6 1859 422.6 1860 422.6 1861 422.6 1862 422.6 1863 422.6 1864 422.6 1865 422.6 1866 422.6 1867 422.6 1868 422.6 1869 422.6 1870 422.6 1871 422.6 1872 422.6 1873 422.6 1874 422.6 1875 422.6 1876 422.6 1877 422.6 1878 422.6 1879 422.6 1880 422.6 1881 422.6 1882 422.6 1883 422.6 1884 422.6 1885 422.6 1886 422.6 1887 422.6 1888 422.6 1889 422.6 1890 422.6 1891 422.6 1892 422.6 1893 422.6 1894 422.6 1895 422.6 1896 422.5 1897 422.4 1898 422.3 1899 422 1900 421.7 1901 421.4 1902 420.9 1903 420.4 1904 419.9 1905 419.2 1906 418.6 1907 417.8 1908 417 1909 416.1 1910 415.2 1911 414.2 1912 413.2 1913 412.2 1914 411.2 1915 410.2 1916 409.3 1917 408.3 1918 407.3 1919 406.3 1920 405.3 1921 404.3 1922 403.3 1923 402.3 1924 401.3 1925 400.3 1926 399.3 1927 398.4 1928 397.4 1929 396.4 1930 395.4 1931 394.4 1932 393.4 1933 392.4 1934 391.4 1935 390.4 1936 389.4 1937 388.4 1938 387.4 1939 386.4 1940 385.4 1941 376.2 1942 368.3 1943 359.4 1944 350.7 1945 342.1 1946 334.8 1947 326.4 1948 318.2 1949 310.2 1950 303.3 1960 282.7 1969 272.5 1970 267.2 1971 261.9 1972 256.5 1973 250.9 1974 245.3 1975 239.7 1976 234 1977 228.5 1978 223 1979 217.4 1980 212 1981 206.5 1982 201.2 1983 196 1984 190.6 1985 185.2 1986 180.7 1987 177.6 1988 176.3 1989 176 1990 176 1991 176 1992 176 1993 176 1994 176 1995 176 1996 176 1997 176 1998 176 1999 176 2000 175.9 2001 175.1 2002 172.4 2003 167.7 2004 161.9 2005 156 2006 150.3 2007 144.9 2008 140 2009 135.1 2010 130.7 2011 126.4 2012 122.3 2013 118.5