Year Years 1800 412.3 1801 412.3 1802 412.3 1803 412.3 1804 412.3 1805 412.3 1806 412.3 1807 412.3 1808 412.3 1809 412.3 1810 412.3 1811 412.3 1812 412.3 1813 412.3 1814 412.3 1815 412.3 1816 412.3 1817 412.3 1818 412.3 1819 412.3 1820 412.3 1821 412.3 1822 412.3 1823 412.3 1824 412.3 1825 412.3 1826 412.3 1827 412.3 1828 412.3 1838 383.2 1839 438.6 1840 414.5 1841 323.8 1842 270 1843 421.1 1844 257.7 1845 279.3 1846 608.3 1847 416 1848 303.5 1849 392.4 1850 404.9 1851 439.2 1852 279.4 1853 227.7 1854 264 1855 289.4 1856 289.8 1857 324.7 1858 350.6 1859 388.4 1860 530.4 1861 438.2 1862 420.7 1863 292 1864 326.7 1865 329.9 1866 383.6 1867 330.3 1868 341.3 1869 427 1870 287.6 1871 340.7 1872 490.5 1873 290.5 1874 299 1875 339.8 1876 302.4 1877 244.1 1878 277.4 1879 230.3 1880 268.6 1881 364.7 1882 587.5 1883 405.4 1884 248.3 1885 228.6 1886 217.6 1887 238.8 1888 182.7 1889 130.3 1890 340.7 1891 216.8 1892 135.4 1893 118.4 1894 161.3 1895 167.9 1896 150.8 1897 183.1 1898 212.3 1899 136.6 1900 168.2 1901 121.1 1902 184.7 1903 208 1904 125.8 1905 148 1906 113.7 1907 164.2 1908 228.5 1909 174.2 1910 141.6 1911 117.7 1912 94.83 1913 85.77 1914 142.2 1915 100.1 1916 124 1917 81.69 1918 79.01 1919 91.51 1920 135.4 1921 93.1 1922 87.71 1923 80.6 1924 99.09 1925 67.33 1926 66.94 1927 116.7 1928 61.99 1929 63.27 1930 63.95 1931 69.48 1932 60.23 1933 54.75 1934 70.24 1935 98.98 1936 67.68 1937 45.48 1938 40.86 1939 49.22 1940 50.15 1941 48.16 1942 67.62 1943 42.85 1944 49.62 1945 44.56 1946 39.07 1947 32.21 1948 33.99 1949 29.36 1950 30.6 1951 29.1 1952 27.7 1953 26.5 1954 25.4 1955 24.4 1956 23.6 1957 22.9 1958 22.3 1959 21.9 1960 21.5 1961 21.1 1962 20.7 1963 20.2 1964 19.7 1965 19.1 1966 18.4 1967 17.8 1968 17.1 1969 16.5 1970 15.8 1971 15.2 1972 14.6 1973 14 1974 13.4 1975 12.8 1976 12.2 1977 11.6 1978 10.9 1979 10.3 1980 9.8 1981 9.3 1982 8.8 1983 8.4 1984 8 1985 7.7 1986 7.4 1987 7.1 1988 6.9 1989 6.6 1990 6.4 1991 6.2 1992 5.9 1993 5.7 1994 5.5 1995 5.2 1996 5 1997 4.7 1998 4.5 1999 4.2 2000 4 2001 3.8 2002 3.6 2003 3.4 2004 3.3 2005 3.1 2006 2.9 2007 2.8 2008 2.7 2009 2.5 2010 2.4 2011 2.3 2012 2.2 2013 2.1