Year Years 1800 435.8 1801 435.8 1802 435.8 1803 435.8 1804 435.8 1805 435.8 1806 435.8 1807 435.8 1808 435.8 1809 435.8 1810 435.8 1811 435.8 1812 435.8 1813 435.8 1814 435.8 1815 435.8 1816 435.8 1817 435.8 1818 435.8 1819 435.8 1820 435.8 1821 435.8 1822 435.8 1823 435.8 1824 435.8 1825 435.8 1826 435.8 1827 435.8 1828 435.8 1829 435.8 1830 435.8 1831 435.8 1832 435.8 1833 435.8 1834 435.8 1835 435.8 1836 435.8 1837 435.8 1838 435.8 1839 435.8 1840 435.8 1841 435.8 1842 435.8 1843 435.8 1844 435.8 1845 435.8 1846 435.8 1847 435.8 1848 435.8 1849 435.8 1850 435.8 1851 435.8 1852 435.8 1853 435.8 1854 435.8 1855 435.8 1856 435.8 1857 435.8 1858 435.8 1859 435.8 1860 435.8 1861 435.8 1862 435.8 1863 435.8 1864 435.8 1865 435.8 1866 435.8 1867 435.8 1868 435.8 1869 435.8 1870 435.8 1871 435.8 1872 435.8 1873 435.8 1874 435.8 1875 435.8 1876 435.8 1877 435.8 1878 435.8 1879 435.8 1880 435.8 1881 435.8 1882 435.8 1883 435.8 1884 435.8 1885 435.8 1886 435.8 1887 435.8 1888 435.8 1889 435.8 1890 435.8 1891 435.8 1892 435.8 1893 435.8 1894 435.8 1895 435.8 1896 435.7 1897 435.6 1898 435.4 1899 435.2 1900 434.9 1901 434.5 1902 434 1903 433.5 1904 432.9 1905 432.3 1906 431.6 1907 430.8 1908 429.9 1909 429 1910 428.1 1911 427.1 1912 426.1 1913 425.1 1914 424 1915 423 1916 422 1917 421 1918 419.9 1919 418.9 1920 417.9 1921 416.9 1922 415.9 1923 414.8 1924 413.8 1925 412.8 1926 411.8 1927 410.7 1928 409.7 1929 408.7 1930 407.7 1931 406.6 1932 405.6 1933 404.6 1934 403.6 1935 402.6 1936 401.5 1937 400.5 1938 399.5 1939 398.5 1940 397.4 1941 396.4 1942 395.4 1943 394.4 1944 393.4 1945 392.3 1946 378.3 1947 365.9 1948 352.6 1949 339.6 1950 327 1951 324.1 1952 317 1953 310.6 1954 304.9 1955 298.9 1956 293.6 1957 288 1958 282 1959 276.1 1960 270.3 1961 264.5 1962 257 1963 249.6 1964 240.6 1965 231.8 1966 221.5 1967 211.5 1968 202.7 1978 124.4 1979 120.3 1980 116.3 1981 112.4 1982 108.8 1983 105.5 1984 102.6 1985 100 1986 97.9 1987 96.1 1988 94.7 1989 93.6 1990 92.7 1991 91.8 1992 90.9 1993 90.1 1994 89.3 1995 88.4 1996 87.7 1997 87 1998 86.3 1999 85.4 2000 84.6 2001 83.4 2002 82 2003 80.3 2004 78.4 2005 76.4 2006 74.2 2007 71.7 2008 68.7 2009 66.1 2010 63.5 2011 60.6 2012 57.8 2013 56.1