Year Years
1800 344.8
1801 344.8
1802 344.8
1803 344.8
1804 344.8
1805 344.8
1806 344.8
1807 344.8
1808 344.8
1809 344.8
1810 344.8
1811 344.8
1812 344.8
1813 344.8
1814 344.8
1815 344.8
1816 344.8
1817 344.8
1818 344.8
1819 344.8
1820 344.8
1821 344.8
1822 344.8
1823 344.8
1824 344.8
1825 344.8
1826 344.8
1827 344.8
1828 344.8
1829 344.8
1830 344.8
1831 344.8
1832 344.8
1833 344.8
1834 344.8
1835 344.8
1836 344.8
1837 344.8
1838 344.8
1839 344.8
1840 344.8
1841 344.8
1842 344.8
1843 344.8
1844 344.8
1845 344.8
1846 344.8
1847 344.8
1848 344.8
1849 344.8
1850 344.8
1851 344.8
1852 344.8
1853 344.8
1854 344.8
1855 344.8
1856 344.8
1857 344.8
1858 344.8
1859 344.8
1860 344.8
1861 344.8
1862 344.8
1863 344.8
1864 344.8
1865 344.8
1866 344.8
1876 276.1
1877 285.1
1878 279.8
1879 257.1
1880 253.2
1881 262.2
1882 240.4
1883 220.6
1884 218.1
1885 231
1886 222
1887 216.2
1888 203.9
1889 217.8
1890 208.1
1891 225.4
1892 196.6
1893 204.8
1894 207.9
1895 203.3
1896 178.4
1897 181.2
1898 197.6
1899 180.7
1900 197
1901 183.5
1902 168.3
1903 169
1904 182.5
1905 169.2
1906 164.3
1907 154.7
1908 141.4
1909 150.6
1910 140.7
1911 154.1
1912 122.7
1913 125.2
1914 118.4
1915 112.5
1916 102.9
1917 103.8
1918 126.8
1919 110.7
1920 120.9
1921 95.34
1922 87.72
1923 77.81
1924 78.75
1925 77.08
1926 73.86
1927 74.24
1928 73.89
1929 69.71
1930 67.4
1931 65.2
1932 66.8
1933 61.07
1934 59.72
1935 62.74
1936 59.67
1937 60.55
1938 55.96
1939 54.46
1940 61.64
1941 54.27
1942 50.79
1943 51.28
1944 53.5
1945 51.32
1946 49.49
1947 47.77
1948 43.87
1949 42.13
1950 38.5
1951 37.2
1952 35.8
1953 34.5
1954 33.1
1955 31.7
1956 30.2
1957 28.9
1958 27.9
1959 27.1
1960 26.5
1961 26
1962 25.4
1963 24.6
1964 23.6
1965 22.5
1966 21.6
1967 20.7
1968 19.9
1969 19.2
1970 18.4
1971 17.6
1972 16.7
1973 15.8
1974 14.8
1975 13.8
1976 12.9
1977 12.1
1978 11.4
1979 10.8
1980 10.4
1981 10
1982 9.7
1983 9.4
1984 9.2
1985 9
1986 8.9
1987 8.8
1988 8.6
1989 8.4
1990 8.2
1991 7.9
1992 7.5
1993 7.1
1994 6.7
1995 6.4
1996 6.1
1997 5.9
1998 5.8
1999 5.7
2000 5.6
2001 5.6
2002 5.5
2003 5.3
2004 5.2
2005 5.1
2006 5
2007 4.8
2008 4.7
2009 4.6
2010 4.5
2011 4.4
2012 4.3
2013 4.2