Year Years 1800 389.8 1801 389.8 1802 389.8 1803 389.8 1804 389.8 1805 389.8 1806 389.8 1807 389.8 1808 389.8 1809 389.8 1810 389.8 1811 389.8 1812 389.8 1813 389.8 1814 389.8 1815 389.8 1816 389.8 1817 389.8 1818 389.8 1819 389.8 1820 389.8 1821 389.8 1822 389.8 1823 389.8 1824 389.8 1825 389.8 1826 389.8 1827 389.8 1828 389.8 1829 389.8 1830 389.8 1831 389.8 1832 389.8 1833 389.8 1834 389.8 1835 389.8 1836 389.8 1837 389.8 1838 389.8 1839 389.8 1840 389.8 1841 389.8 1842 389.8 1843 389.8 1844 389.8 1845 389.8 1846 389.8 1847 389.8 1848 389.8 1849 389.8 1850 389.8 1851 389.8 1852 389.8 1853 389.8 1854 389.8 1855 389.8 1856 389.8 1857 389.8 1858 389.8 1859 389.8 1860 389.8 1861 389.8 1862 389.8 1863 389.8 1864 389.8 1865 389.8 1866 389.8 1867 389.8 1868 389.8 1869 389.8 1879 265.2 1880 320.4 1881 281.1 1882 225.9 1883 247.9 1884 270.1 1885 258.5 1886 249.7 1887 276.2 1888 263.5 1889 284.4 1890 305.7 1891 284.4 1892 266.8 1893 274.7 1894 273.2 1895 289.3 1896 286 1897 287.7 1898 284.4 1899 276.2 1900 282.7 1901 265.2 1902 263.5 1903 304.1 1904 313.9 1905 268.4 1906 322 1907 364.1 1908 279.4 1909 284.4 1910 289.3 1911 305.7 1912 315.5 1913 279.4 1914 271.6 1915 286 1916 286 1917 300.8 1918 286 1919 263.5 1920 281.1 1921 320.4 1922 287.7 1923 277.8 1924 261.9 1925 281.1 1926 273.2 1927 281.1 1928 255 1929 260.2 1930 225.9 1931 249.7 1932 225.9 1933 242.5 1934 209.1 1935 220.3 1936 207.2 1937 182.8 1938 203.5 1939 188.4 1940 171.6 1941 156.7 1942 145.6 1943 136.6 1944 147.4 1945 152.9 1946 145.1 1947 139.6 1948 134.3 1949 130 1950 140.5 1951 133.2 1952 126.4 1953 120 1954 113.9 1955 108.2 1956 102.8 1957 97.9 1958 93.1 1959 88.8 1960 84.7 1961 80.9 1962 77.5 1963 74.3 1964 71.4 1965 68.7 1966 66.2 1967 63.7 1968 61.4 1969 59.1 1970 56.8 1971 54.6 1972 52.5 1973 50.5 1974 48.6 1975 46.8 1976 45.2 1977 43.7 1978 42.3 1979 40.9 1980 39.7 1981 38.5 1982 37.3 1983 36.3 1984 35.2 1985 34.2 1986 33.2 1987 32.3 1988 31.5 1989 30.6 1990 29.8 1991 29.1 1992 28.3 1993 27.6 1994 26.9 1995 26.4 1996 25.8 1997 25.3 1998 24.8 1999 24.3 2000 23.7 2001 23.2 2002 22.7 2003 22.2 2004 21.6 2005 21.1 2006 20.5 2007 20 2008 19.4 2009 18.8 2010 18.3 2011 17.8 2012 17.2 2013 16.6