Year Years
1800 421.3
1801 421.3
1802 421.3
1803 421.3
1804 421.3
1805 421.3
1806 421.3
1807 421.3
1808 421.3
1809 421.3
1810 421.3
1811 421.3
1812 421.3
1813 421.3
1814 421.3
1815 421.3
1816 421.3
1817 421.3
1818 421.3
1819 421.3
1820 421.3
1821 421.3
1822 421.3
1823 421.3
1824 421.3
1825 421.3
1826 421.3
1827 421.3
1828 421.3
1829 421.3
1830 421.3
1831 421.3
1832 421.3
1833 421.3
1834 421.3
1835 421.3
1836 421.3
1837 421.3
1838 421.3
1839 421.3
1840 421.3
1841 421.3
1842 421.3
1843 421.3
1844 421.3
1845 421.3
1846 421.3
1847 421.3
1848 421.3
1849 421.3
1850 421.3
1851 421.3
1852 421.3
1853 421.3
1854 421.3
1855 421.3
1856 421.3
1857 421.3
1858 421.3
1859 421.3
1860 421.3
1861 421.3
1862 421.3
1863 421.3
1864 421.3
1865 421.3
1866 421.3
1867 421.3
1868 421.3
1869 421.3
1870 421.3
1871 421.3
1872 421.3
1873 421.3
1874 421.3
1875 421.3
1876 421.3
1877 421.3
1878 421.3
1879 421.3
1880 421.3
1881 421.3
1882 421.3
1883 421.3
1884 421.3
1885 421.3
1886 421.3
1887 421.3
1888 421.3
1889 421.3
1890 421.3
1891 421.3
1892 421.3
1893 421.3
1894 421.3
1895 421.3
1896 421.2
1897 421.1
1898 421
1899 420.7
1900 420.4
1901 420.1
1902 419.6
1903 419.1
1904 418.6
1905 418
1906 417.3
1907 416.5
1908 415.7
1909 414.8
1910 413.9
1911 412.9
1912 411.9
1913 411
1914 410
1915 409
1916 408
1917 407
1918 406
1919 405
1920 404
1921 403.1
1922 402.1
1923 401.1
1924 400.1
1925 399.1
1926 398.1
1927 397.1
1928 396.1
1929 395.1
1930 394.1
1931 393.2
1932 392.2
1933 391.2
1934 390.2
1935 389.2
1936 377.6
1937 367.3
1938 356.2
1939 345.3
1940 334.6
1950 276.6
1951 262.3
1952 248.6
1953 235.4
1954 222.7
1955 210.6
1956 198.8
1957 187.7
1958 177
1959 166.7
1960 157.1
1961 148
1962 139.5
1963 131.5
1964 124.1
1965 117.3
1966 110.9
1967 105
1968 99.6
1969 94.4
1970 89.7
1971 85.3
1972 81.1
1973 77.2
1974 73.5
1975 70.1
1976 66.8
1977 63.7
1978 60.8
1979 58.1
1980 55.5
1981 53
1982 50.7
1983 48.5
1984 46.4
1985 44.4
1986 42.6
1987 40.9
1988 39.3
1989 37.9
1990 36.7
1991 35.5
1992 34.5
1993 33.5
1994 32.6
1995 31.8
1996 30.9
1997 30.1
1998 29.4
1999 28.6
2000 27.8
2001 27
2002 26.2
2003 25.4
2004 24.6
2005 23.9
2006 23.1
2007 22.4
2008 21.8
2009 21.1
2010 20.5
2011 19.9
2012 19.3
2013 18.7