Year Years 1800 402.2 1801 402.2 1802 402.2 1803 402.2 1804 402.2 1805 402.2 1806 402.2 1807 402.2 1808 402.2 1809 402.2 1810 402.2 1811 402.2 1812 402.2 1813 402.2 1814 402.2 1815 402.2 1816 402.2 1817 402.2 1818 402.2 1819 402.2 1820 402.2 1821 402.2 1822 402.2 1823 402.2 1824 402.2 1825 402.2 1826 402.2 1827 402.2 1828 402.2 1829 402.2 1830 402.2 1831 402.2 1832 402.2 1833 402.2 1834 402.2 1835 402.2 1836 402.2 1837 402.2 1838 402.2 1839 402.2 1840 402.2 1841 402.2 1842 402.2 1843 402.2 1844 402.2 1845 402.2 1846 402.2 1847 402.2 1848 402.2 1849 402.2 1850 402.2 1851 402.2 1852 402.2 1853 402.2 1854 402.2 1855 402.2 1856 402.2 1857 402.2 1858 402.2 1859 402.2 1860 402.2 1861 402.2 1862 402.2 1863 402.2 1864 402.2 1865 402.2 1866 402.2 1867 402.2 1868 402.2 1869 402.2 1870 402.2 1871 402.2 1872 402.2 1873 402.2 1874 402.2 1875 402.2 1876 402.2 1877 402.2 1878 403.4 1879 403.4 1880 403.4 1881 404.7 1882 406 1883 407.2 1884 408.5 1885 409.8 1886 406 1887 402.2 1888 399.7 1889 395.9 1890 392.2 1891 393.5 1892 395.9 1893 397.2 1894 399.7 1895 400.9 1896 392.1 1897 383.5 1898 374.9 1899 366.3 1900 357.9 1901 350.6 1911 238.8 1912 229.6 1913 205.3 1914 196 1915 194.1 1916 194.1 1917 201.6 1918 220.3 1919 212.8 1920 199.7 1921 179.1 1922 171.6 1923 171.6 1924 179.1 1925 188.4 1926 184.7 1927 197.8 1928 173.4 1929 162.2 1930 149.3 1931 149.3 1932 140.2 1933 125.9 1934 143.8 1935 160.4 1936 143.8 1937 140.2 1938 154.8 1939 131.2 1940 131.2 1941 122.4 1942 124.1 1943 113.7 1944 115.4 1945 117.2 1946 103.5 1947 110.3 1948 95.24 1949 91.99 1950 93.6 1951 91.99 1952 88.79 1953 85.73 1954 81.22 1955 84.24 1956 76.57 1957 93.6 1958 82.73 1964 57.5 1965 57.5 1966 58.7 1967 58.6 1968 58.4 1969 73.3 1970 72.5 1971 71.5 1972 70.3 1973 68.6 1974 66.4 1975 63.6 1976 60 1977 55.8 1978 51.3 1979 47 1980 43.2 1981 40 1982 37.7 1983 35.8 1984 34.4 1985 33.1 1986 31.9 1987 30.8 1988 29.7 1989 28.6 1990 27.6 1991 26.6 1992 25.7 1993 24.9 1994 24.1 1995 23.4 1996 22.7 1997 22 1998 21.4 1999 20.8 2000 20.2 2001 19.7 2002 19.2 2003 18.6 2004 17.9 2005 17.1 2006 16.4 2007 15.8 2008 15.4 2009 15 2010 14.6 2011 14.2 2012 13.7 2013 13.3