Year Years
1800 500.4
1801 500.4
1802 500.4
1803 500.4
1804 500.4
1805 500.4
1806 500.4
1807 500.4
1808 500.4
1809 500.4
1810 500.4
1811 500.4
1812 500.4
1813 500.4
1814 500.4
1815 500.4
1816 500.4
1817 500.4
1818 500.4
1819 500.4
1820 500.4
1821 500.4
1822 500.4
1823 500.4
1824 500.4
1825 500.4
1826 500.4
1827 500.4
1828 500.4
1829 500.4
1830 500.4
1831 500.4
1832 500.4
1833 500.4
1834 500.4
1835 500.4
1836 500.4
1837 500.4
1838 500.4
1839 500.4
1840 500.4
1841 500.4
1842 500.4
1843 500.4
1844 500.4
1845 500.4
1846 500.4
1847 500.4
1848 500.4
1849 500.4
1850 500.4
1851 500.4
1852 500.4
1853 500.4
1854 500.4
1855 500.4
1856 500.4
1857 500.4
1858 500.4
1859 500.4
1860 500.4
1861 500.4
1862 500.4
1863 500.4
1864 500.4
1865 500.4
1866 500.4
1867 500.4
1868 500.4
1869 500.4
1870 500.4
1871 500.4
1872 500.4
1873 500.4
1874 500.4
1875 500.4
1876 500.4
1877 500.4
1878 500.4
1879 500.4
1880 500.4
1881 500.4
1882 500.4
1883 500.4
1884 500.4
1885 500.4
1886 500.4
1887 500.4
1888 500.4
1889 500.4
1890 500.4
1891 500.4
1892 500.4
1893 500.4
1894 500.3
1895 500.3
1896 500.2
1897 500.1
1898 499.9
1899 499.6
1900 499.3
1901 498.8
1902 498.3
1903 497.7
1904 504.6
1905 511.3
1906 518.1
1907 524.8
1908 531.6
1909 525.8
1910 520
1911 514.2
1912 508.5
1913 502.7
1914 495.6
1915 488.6
1916 481.7
1917 474.8
1918 468
1919 460
1920 452
1921 444.2
1922 436.5
1923 428.9
1924 417.6
1925 405.3
1926 394.4
1927 383.8
1928 373.4
1929 363.2
1930 354.4
1931 344.5
1932 336
1933 326.5
1934 315.1
1935 302.9
1936 292
1937 281.4
1938 270
1939 263.6
1940 258.2
1941 252
1942 245.8
1943 262.8
1944 280.2
1945 298.2
1946 316.8
1947 336
1948 355.9
1949 376.5
1950 398
1960 122.4
1961 116.7
1962 110.9
1963 105.3
1964 99.9
1965 94.55
1966 89.06
1967 84.1
1968 79.14
1969 73.85
1970 68.83
1971 65.79
1972 62.78
1973 59.81
1974 56.87
1975 53.96
1976 51.09
1977 48.26
1978 45.49
1979 42.74
1980 40.06
1985 35.1
1986 34.7
1987 35.2
1988 36.8
1989 39.5
1990 43.4
1991 48.6
1992 54.8
1993 61.3
1994 67.7
1995 72.8
1996 75.7
1997 75.7
1998 72.9
1999 67.4
2000 60
2001 52
2002 44.6
2003 38.7
2004 34.7
2005 32.7
2006 32.2
2007 32.4
2008 32.4
2009 32.1
2010 31.3
2011 30.1
2012 28.7
2013 27.4