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
1921 162.2
1922 138.4
1923 156.7
1924 164.1
1925 177.2
1926 136.6
1927 160.4
1928 149.3
1929 136.6
1930 149.3
1931 167.8
1932 147.4
1933 136.6
1934 142
1935 152.9
1936 134.8
1937 142
1938 147.4
1939 117.2
1940 124.1
1941 118.9
1942 136.6
1943 110.3
1944 90.4
1946 84.24
1947 98.52
1948 82.73
1949 68.83
1954 58.9
1955 60.7
1956 62.4
1957 63.7
1958 64.6
1959 64.7
1960 63.9
1961 62.5
1962 61
1963 59.7
1964 58.7
1965 58
1966 57.6
1967 57.1
1968 56.3
1969 55.3
1970 54.4
1971 53.7
1972 53.6
1973 54.3
1974 55.1
1975 55.3
1976 54.4
1977 52.1
1978 48.5
1979 44.3
1980 40
1981 36.2
1982 33.3
1983 31.3
1984 29.8
1985 28.6
1986 27.5
1987 26.3
1988 25.1
1989 24
1990 23.1
1991 22.3
1992 21.8
1993 21.4
1994 21.1
1995 20.6
1996 20
1997 19.2
1998 18.3
1999 17.5
2000 16.8
2001 16.3
2002 15.8
2003 15.3
2004 14.8
2005 14.3
2006 13.8
2007 13.3
2008 13
2009 12.7
2010 12.3
2011 12
2012 11.6
2013 11.1