Year Years 1800 427.9 1801 427.9 1802 427.9 1803 427.9 1804 427.9 1805 427.9 1806 427.9 1807 427.9 1808 427.9 1809 427.9 1810 427.9 1811 427.9 1812 427.9 1813 427.9 1814 427.9 1815 427.9 1816 427.9 1817 427.9 1818 427.9 1819 427.9 1820 427.9 1821 427.9 1822 427.9 1823 427.9 1824 427.9 1825 427.9 1826 427.9 1827 427.9 1828 427.9 1829 427.9 1830 427.9 1831 427.9 1832 427.9 1833 427.9 1834 427.9 1835 427.9 1836 427.9 1837 427.9 1838 427.9 1839 427.9 1840 427.9 1841 427.9 1842 427.9 1843 427.9 1844 427.9 1845 427.9 1846 427.9 1847 427.9 1848 427.9 1849 427.9 1850 427.9 1851 427.9 1852 427.9 1853 427.9 1854 427.9 1855 427.9 1856 427.9 1857 427.9 1858 427.9 1859 427.9 1860 427.9 1861 427.9 1871 203.5 1872 227.8 1873 351.2 1874 274.7 1875 270.1 1876 251.5 1877 242.5 1878 249.7 1879 225.9 1880 216.6 1881 268.4 1882 284.4 1883 335 1884 270.1 1885 281.1 1886 249.7 1887 299.1 1888 266.8 1889 212.8 1890 284.4 1891 273.2 1892 336.6 1893 351.2 1894 309 1895 343.1 1896 483.9 1898 310.6 1899 286 1900 330.1 1901 362.5 1902 318.8 1903 251.5 1904 225.9 1905 312.3 1906 281.1 1907 261.9 1908 305.7 1909 268.4 1910 253.2 1911 242.5 1912 286 1913 227.8 1914 231.5 1915 270.1 1916 220.3 1917 291 1918 323.6 1919 344.7 1921 287.7 1922 261.9 1923 246.1 1924 224.1 1925 201.6 1926 201.6 1927 235.2 1928 212.8 1929 225.9 1930 322 1931 330.1 1932 258.5 1933 209.1 1934 205.3 1935 222.2 1936 227.8 1937 249.7 1938 265.2 1939 256.7 1940 263.5 1941 214.7 1942 265.2 1943 227.8 1944 225.9 1945 305.7 1946 233.3 1947 175.3 1948 302.4 1949 133 1950 106.9 1951 120.6 1952 115.4 1953 138.4 1954 115.4 1955 129 1956 135.5 1957 121.1 1958 111.7 1959 105.8 1960 102 1961 98.6 1962 93.4 1963 87 1964 83.6 1965 86.3 1966 92.7 1967 96 1968 92.7 1969 86.9 1970 82.9 1971 81 1972 79.4 1973 76.9 1974 72.3 1975 65.2 1976 57.3 1977 50.8 1978 46.2 1979 42.9 1980 40.3 1981 37.8 1982 34.7 1983 31.3 1984 28.9 1985 28.4 1986 28.9 1987 28.8 1988 27.1 1989 24.9 1990 23.1 1991 21.8 1992 21.2 1993 21.2 1994 21.6 1995 22.2 1996 22.7 1997 22.6 1998 21.6 1999 20.2 2000 18.6 2001 17.1 2002 16.1 2003 15.6 2004 15.6 2005 15.7 2006 15.9 2007 16 2008 15.8 2009 15.5 2010 15.2 2011 14.9 2012 14.6 2013 14.3