Year Years
1800 434.5
1801 434.5
1802 434.5
1803 434.5
1804 434.5
1805 434.5
1806 434.5
1807 434.5
1808 434.5
1809 434.5
1810 434.5
1811 434.5
1812 434.5
1813 434.5
1814 434.5
1815 434.5
1816 434.5
1817 434.5
1818 434.5
1819 434.5
1820 434.5
1821 434.5
1822 434.5
1823 434.5
1824 434.5
1825 434.5
1826 434.5
1827 434.5
1828 434.5
1829 434.5
1830 434.5
1831 434.5
1832 434.5
1833 434.5
1834 434.5
1835 434.5
1836 434.5
1837 434.5
1838 434.5
1839 434.5
1840 434.5
1841 434.5
1842 434.5
1843 434.5
1844 434.5
1845 434.5
1846 434.5
1847 434.5
1848 434.5
1849 434.5
1850 434.5
1851 434.5
1852 434.5
1853 434.5
1854 434.5
1855 434.5
1856 434.5
1857 434.5
1858 434.5
1859 434.5
1860 434.5
1861 434.5
1862 434.5
1863 434.5
1864 434.5
1865 434.5
1866 434.5
1867 434.5
1868 434.5
1869 434.5
1870 434.5
1871 434.5
1872 434.5
1873 434.5
1874 434.5
1875 434.5
1876 434.5
1877 434.5
1878 434.5
1879 434.5
1880 434.5
1881 434.5
1882 434.5
1883 434.5
1884 434.5
1885 434.5
1886 434.5
1887 434.5
1888 434.5
1889 434.5
1890 434.5
1891 434.5
1892 434.5
1893 434.5
1894 434.4
1895 434.4
1896 434.4
1897 434.2
1898 434.1
1899 433.8
1900 433.5
1901 433.1
1902 432.7
1903 432.2
1904 431.6
1905 431
1906 430.3
1907 429.5
1908 428.6
1909 427.7
1910 426.8
1911 425.8
1912 424.8
1913 423.8
1914 422.7
1915 421.7
1916 420.7
1917 419.7
1918 418.7
1919 417.6
1920 416.6
1921 415.6
1922 414.6
1923 413.6
1924 412.5
1925 411.5
1926 410.5
1927 409.5
1928 408.5
1929 407.4
1930 406.4
1931 405.4
1932 404.4
1933 403.4
1934 402.4
1935 401.3
1936 400.3
1937 399.3
1938 398.3
1939 397.2
1940 396.2
1941 395.2
1942 394.2
1943 393.2
1944 392.1
1945 391.1
1946 365.7
1947 340.3
1948 317.2
1949 294.1
1950 273
1960 204.2
1961 193.7
1962 182.9
1963 172.2
1964 161.4
1965 150.4
1966 139.4
1967 128.5
1968 117.9
1969 107.4
1970 97.5
1971 88.3
1972 79.8
1973 72
1974 65
1975 58.7
1976 52.9
1977 47.7
1978 43
1979 38.8
1980 35
1981 31.7
1982 28.9
1983 26.5
1984 24.4
1985 22.6
1986 21
1987 19.7
1988 18.5
1989 17.5
1990 16.5
1991 15.7
1992 14.9
1993 14.2
1994 13.6
1995 13.1
1996 12.7
1997 12.2
1998 11.8
1999 11.5
2000 11.2
2001 10.9
2002 10.6
2003 10.3
2004 10
2005 9.8
2006 9.6
2007 9.4
2008 9.2
2009 9
2010 8.8
2011 8.7
2012 8.5
2013 8.2