Year Years
1800 322.4
1801 322.4
1802 322.4
1803 322.4
1804 322.4
1805 322.4
1806 322.4
1807 321.3
1808 321.3
1809 321.3
1810 321.3
1811 321.3
1812 321.3
1813 321.3
1814 321.3
1815 321.3
1816 321.3
1817 321.3
1818 321.3
1819 320.2
1820 320.2
1821 320.2
1822 320.2
1823 320.2
1824 320.2
1834 312.3
1835 271.6
1836 281.1
1837 300.8
1838 309
1839 300.8
1840 295.9
1841 275.4
1842 293.2
1843 274.9
1844 250.2
1845 261.5
1846 293.9
1847 304.5
1848 270.1
1849 291.6
1850 243.7
1851 258.5
1852 258.3
1853 254.1
1854 280.3
1855 308
1856 279
1857 283.3
1858 279.4
1859 292.3
1860 224
1861 273.4
1862 258.9
1863 280.1
1864 289.2
1865 317.5
1866 319.8
1867 258.3
1868 270.4
1869 264.5
1870 275
1871 340.5
1872 294.3
1873 252.1
1874 243.6
1875 272.8
1876 250.5
1877 240.4
1878 239.6
1879 246.3
1880 274.7
1881 241.8
1882 233.6
1883 235.4
1884 249
1885 230.3
1886 265.9
1887 231.6
1888 248.3
1889 251
1890 256.2
1891 255.4
1892 261.8
1893 255.4
1894 225.9
1895 246.8
1896 217
1897 210.8
1898 224
1899 240.2
1900 234.5
1901 204.1
1902 207.9
1903 212.8
1904 212.4
1905 202
1906 210.4
1907 188.6
1908 207
1909 195.9
1910 193.8
1911 218.2
1912 176.6
1913 179.4
1914 205.3
1915 196
1916 179.1
1917 224.1
1918 212.8
1919 183.2
1920 160.2
1921 157.5
1922 146.3
1923 130.1
1924 120.2
1925 129.5
1926 132
1927 125.8
1928 120.8
1929 140.3
1930 129.3
1931 109.9
1932 115.2
1933 112
1934 100.4
1935 102.5
1936 105.2
1937 102.9
1938 102.2
1939 100.1
1940 106.7
1941 103.6
1942 103.5
1943 97.67
1944 101.9
1945 118.2
1946 94.02
1947 77.85
1948 67.76
1949 63.74
1950 59.32
1951 55.94
1952 51.25
1953 51.2
1954 48.3
1955 45.5
1956 42.8
1957 40.1
1958 37.7
1959 35.6
1960 33.9
1961 32.4
1962 31.1
1963 30
1964 28.9
1965 27.9
1966 27
1967 26.2
1968 25.5
1969 24.8
1970 24
1971 23
1972 21.9
1973 20.8
1974 19.6
1975 18.6
1976 17.6
1977 16.7
1978 15.9
1979 15.2
1980 14.5
1981 13.9
1982 13.3
1983 12.7
1984 12.2
1985 11.8
1986 11.4
1987 11
1988 10.7
1989 10.3
1990 10
1991 9.6
1992 9.2
1993 8.7
1994 8.2
1995 7.6
1996 7.1
1997 6.7
1998 6.3
1999 6
2000 5.8
2001 5.6
2002 5.4
2003 5.2
2004 5.1
2005 5
2006 4.9
2007 4.8
2008 4.7
2009 4.6
2010 4.5
2011 4.5
2012 4.4
2013 4.4