Year Years 1800 406 1801 406 1802 406 1803 406 1804 406 1805 406 1806 406 1807 406 1808 406 1809 406 1810 406 1811 406 1812 406 1813 406 1814 406 1815 406 1816 406 1817 406 1818 406 1819 406 1820 406 1821 406 1822 406 1823 406 1824 406 1825 406 1826 406 1827 406 1828 406 1829 406 1830 406 1831 406 1832 406 1833 406 1834 406 1835 406 1836 406 1837 406 1838 406 1839 406 1840 406 1841 406 1842 406 1843 406 1844 406 1845 406 1846 406 1847 406 1848 406 1849 406 1850 406 1851 406 1852 406 1853 406 1854 406 1855 406 1856 406 1857 406 1858 406 1859 406 1860 406 1861 406 1862 406 1863 406 1864 406 1865 406 1866 406 1867 406 1868 406 1869 406 1870 406 1871 406 1872 406 1873 406 1874 406 1875 406 1876 406 1877 406 1878 406 1879 406 1880 406 1881 406 1882 406 1883 406 1884 406 1885 406 1886 406 1887 406 1888 406 1889 406 1890 406 1891 406 1892 406 1893 406 1894 405.9 1895 405.9 1896 405.9 1897 405.8 1898 405.6 1899 405.4 1900 405.1 1901 404.7 1902 404.3 1903 403.9 1904 403.3 1905 402.7 1906 402 1907 401.3 1908 400.5 1909 399.7 1910 398.8 1911 397.9 1912 396.9 1913 396 1914 395 1915 394.1 1916 393.1 1917 392.1 1918 391.2 1919 390.2 1920 389.3 1921 388.3 1922 387.4 1923 386.4 1924 385.5 1925 384.5 1926 372.9 1927 362.8 1928 351.6 1929 340.7 1930 330.1 1931 320.7 1932 310.4 1933 300.4 1934 291.5 1935 281.8 1936 272.4 1937 264 1938 254.9 1939 245.9 1940 237.1 1941 229.4 1942 221 1943 212.7 1944 205.4 1945 197.4 1946 189.6 1947 181.9 1948 175.2 1949 167.8 1950 160.5 1951 157.9 1952 152.3 1953 147.4 1954 142.3 1955 137.2 1956 132.6 1957 128.7 1958 124 1959 120.1 1960 116.2 1961 113 1962 109.3 1963 106.2 1964 102.5 1965 98.91 1966 95.34 1967 92.39 1968 89.05 1969 86.41 1970 83.41 1971 81.07 1972 79.37 1982 71.9 1983 56.9 1984 55.5 1985 54.1 1986 52.8 1987 51.5 1988 50.2 1989 48.9 1990 47.7 1991 46.4 1992 45.1 1993 43.8 1994 42.5 1995 41.2 1996 39.8 1997 38.5 1998 37.2 1999 36 2000 34.8 2001 33.6 2002 32.5 2003 31.4 2004 30.4 2005 29.4 2006 28.5 2007 27.6 2008 26.7 2009 25.9 2010 25.1 2011 24.3 2012 23.6 2013 22.8