Year Years 1800 438.5 1801 438.5 1802 438.5 1803 438.5 1804 438.5 1805 438.5 1806 438.5 1807 438.5 1808 438.5 1809 438.5 1810 438.5 1811 438.5 1812 438.5 1813 438.5 1814 438.5 1815 438.5 1816 438.5 1817 438.5 1818 438.5 1819 438.5 1820 438.5 1821 438.5 1822 438.5 1823 438.5 1824 438.5 1825 438.5 1826 438.5 1827 438.5 1828 438.5 1829 438.5 1830 438.5 1831 438.5 1832 438.5 1833 438.5 1834 438.5 1835 438.5 1836 438.5 1837 438.5 1838 438.5 1839 438.5 1840 438.5 1841 438.5 1842 438.5 1843 438.5 1844 438.5 1845 438.5 1846 438.5 1847 438.5 1848 438.5 1849 438.5 1850 438.5 1851 438.5 1852 438.5 1853 438.5 1854 438.5 1855 438.5 1856 438.5 1857 438.5 1858 438.5 1859 438.5 1860 438.5 1861 438.5 1862 438.5 1863 438.5 1864 438.5 1865 438.5 1866 438.5 1867 438.5 1868 438.5 1869 438.5 1870 438.5 1871 438.5 1872 438.5 1873 438.5 1874 438.5 1875 438.5 1876 438.5 1877 438.5 1878 438.5 1879 438.5 1880 438.5 1881 438.5 1882 438.5 1883 438.5 1884 438.5 1885 438.5 1886 438.5 1887 438.5 1888 438.5 1889 438.5 1890 438.5 1891 438.5 1892 438.5 1893 438.5 1894 438.4 1895 438.4 1896 438.3 1897 438.2 1898 438.1 1899 437.8 1900 437.5 1901 437.1 1902 436.7 1903 436.2 1904 435.6 1905 434.9 1906 434.2 1907 433.4 1908 432.6 1909 431.7 1910 430.7 1911 429.7 1912 428.7 1913 427.6 1914 426.6 1915 425.6 1916 424.6 1917 423.5 1918 422.5 1919 421.5 1920 420.4 1921 419.4 1922 418.4 1923 417.4 1924 416.3 1925 415.3 1926 414.3 1927 413.2 1928 412.2 1929 411.2 1930 410.2 1931 409.1 1932 408.1 1933 407.1 1934 406.1 1935 405 1936 404 1937 403 1938 401.9 1939 400.9 1940 399.9 1941 398.9 1942 397.8 1943 396.8 1944 395.8 1945 394.7 1946 386.5 1947 378.5 1948 370.6 1949 363.9 1950 356.2 1951 353.1 1952 348.9 1962 313.3 1963 311.3 1964 309.1 1965 306.8 1966 304.6 1967 301.4 1968 297.4 1969 292.6 1970 287 1971 280.6 1972 273.1 1973 265.1 1974 256.9 1975 249 1976 241 1977 233.9 1978 227.9 1979 222.3 1980 217.8 1981 214.4 1982 212.2 1983 211.2 1984 210.9 1985 211.3 1986 212 1987 212.8 1988 213.2 1989 213.4 1990 213.2 1991 212.8 1992 212.2 1993 211.4 1994 210.3 1995 208.5 1996 205.9 1997 202.4 1998 198 1999 193 2000 187.7 2001 182.2 2002 176.5 2003 170.7 2004 164.8 2005 158.9 2006 153 2007 147.4 2008 141.8 2009 136.2 2010 131.1 2011 126.2 2012 121.6 2013 117.4