Year Years
1800 323.5
1801 323.5
1802 323.5
1803 323.5
1804 323.5
1805 323.5
1806 323.5
1807 323.5
1808 323.5
1809 323.5
1810 323.5
1811 323.5
1812 323.5
1813 323.5
1814 323.5
1815 323.5
1816 323.5
1817 323.5
1818 323.5
1819 323.5
1820 323.5
1821 323.5
1822 323.5
1823 323.5
1824 323.5
1825 323.5
1826 323.5
1827 323.5
1828 323.5
1829 323.5
1830 323.5
1840 266.8
1841 277.8
1842 322
1843 274.7
1844 266.8
1845 273.2
1846 373.8
1847 338.3
1848 295.9
1849 274.7
1850 293.7
1851 303.6
1852 315.4
1853 293.1
1854 297.6
1855 343.1
1856 308.9
1857 341.7
1858 329.8
1859 389.6
1860 317.5
1861 332.8
1862 314.7
1863 320.3
1864 315.2
1865 341.5
1866 331.4
1867 310
1868 337.3
1869 288.8
1870 327.6
1871 368.6
1872 344.5
1873 312.5
1874 286.9
1875 324.9
1876 300.4
1877 284.7
1878 298.8
1879 283
1880 314.2
1881 276.2
1882 268.6
1883 283.3
1884 305.2
1885 270.5
1886 295.8
1887 255.5
1888 267.2
1889 267.1
1890 259.2
1891 263
1892 262.5
1893 248.6
1894 230.9
1895 244.3
1896 226.4
1897 214.4
1898 226
1899 215.1
1900 221.3
1901 229.3
1902 202.3
1903 196.8
1904 207.5
1905 190.3
1906 185.4
1907 171.6
1908 185.5
1909 154.1
1910 161.3
1911 188.4
1912 137.9
1913 140.4
1914 143.1
1915 135.2
1916 140.7
1917 140.4
1918 179.1
1919 149.8
1920 123.7
1921 115.2
1922 105.4
1923 94.3
1924 82.89
1925 81.42
1926 85.79
1927 83.34
1928 73.72
1929 81.7
1930 70.15
1931 67.14
1932 62.3
1933 56.75
1934 56.24
1935 52.32
1936 51.89
1937 49.13
1938 49.33
1939 44.76
1940 51.9
1941 56.65
1942 53.97
1943 61.9
1944 70.53
1945 103.4
1946 61.87
1947 41.71
1948 35.74
1949 33.27
1950 31.9
1951 30.4
1952 29
1953 27.7
1954 26.3
1955 25.1
1956 24
1957 23.1
1958 22.2
1959 21.5
1960 20.8
1961 20.3
1962 19.7
1963 19.3
1964 18.8
1965 18.3
1966 17.9
1967 17.4
1968 16.9
1969 16.4
1970 15.8
1971 15.3
1972 14.7
1973 14.1
1974 13.6
1975 13.1
1976 12.6
1977 12.1
1978 11.6
1979 11.2
1980 10.9
1981 10.6
1982 10.4
1983 10.2
1984 9.9
1985 9.7
1986 9.5
1987 9.2
1988 8.9
1989 8.6
1990 8.3
1991 8
1992 7.7
1993 7.4
1994 7.1
1995 6.9
1996 6.7
1997 6.5
1998 6.4
1999 6.3
2000 6.2
2001 6.1
2002 5.9
2003 5.7
2004 5.6
2005 5.4
2006 5.2
2007 5
2008 4.8
2009 4.6
2010 4.4
2011 4.3
2012 4.2
2013 4