Year Years
1800 368
1801 368
1802 368
1803 368
1804 368
1805 368
1806 368
1807 368
1808 368
1809 368
1810 368
1811 368
1812 368
1813 368
1814 368
1815 368
1816 368
1817 368
1818 368
1819 368
1820 368
1821 368
1822 368
1823 368
1824 368
1825 368
1826 368
1827 368
1828 368
1829 368
1830 368
1831 368
1832 368
1833 368
1834 368
1835 368
1836 368
1837 368
1838 368
1839 368
1840 368
1841 368
1842 368
1852 372.2
1853 427.1
1854 428.7
1855 435.2
1856 398
1857 414.1
1858 399.7
1859 404.5
1864 415.7
1865 364.1
1891 420.6
1892 446.6
1893 390
1894 401.3
1895 393.2
1896 367.3
1897 362.5
1898 367.3
1899 339.9
1900 362.5
1901 336.6
1902 356.1
1903 331.8
1904 320.4
1905 377
1906 336.6
1907 344.7
1908 326.9
1909 348
1910 317.1
1911 338.3
1912 464.5
1913 326.9
1914 320.4
1915 428.7
1916 356.1
1917 351.2
1918 352.8
1919 266.8
1920 318.8
1921 313.9
1922 322
1923 299.1
1924 313.9
1925 273.2
1926 271.6
1927 300.8
1928 287.7
1929 291
1930 247.9
1931 263.5
1932 299.1
1933 216.6
1934 238.8
1935 246.1
1936 222.2
1937 211
1938 207.2
1939 188.4
1940 205.3
1941 179.1
1942 211
1943 179.1
1945 274.7
1946 180.9
1947 154.8
1948 138.4
1949 133
1953 81.7
1954 73.2
1955 72.8
1956 71.9
1957 70.1
1958 67.2
1959 63.4
1960 59.4
1961 56.2
1962 54.1
1963 52.5
1964 50.8
1965 49
1966 47.5
1967 46.1
1968 44.9
1969 43.7
1970 42.7
1971 42.3
1972 42.4
1973 42.2
1974 41.1
1975 38.7
1976 35.7
1977 32.5
1978 29.6
1979 27.5
1980 26
1981 25
1982 24.4
1983 24
1984 23.9
1985 23.7
1986 23
1987 21.7
1988 20.4
1989 19.6
1990 19
1991 18.3
1992 17.1
1993 15.9
1994 14.8
1995 13.8
1996 13.1
1997 12.6
1998 12.2
1999 11.7
2000 11.2
2001 10.5
2002 9.9
2003 9.3
2004 8.7
2005 8.3
2006 7.9
2007 7.5
2008 7.2
2009 6.9
2010 6.6
2011 6.4
2012 6.2
2013 6.1