Year Years
1800 413.6
1801 413.6
1802 413.6
1803 413.6
1804 413.6
1805 413.6
1806 413.6
1807 413.6
1808 413.6
1809 413.6
1810 413.6
1811 413.6
1812 413.6
1813 413.6
1814 413.6
1815 413.6
1816 413.6
1817 413.6
1818 413.6
1819 413.6
1820 413.6
1821 413.6
1822 413.6
1823 413.6
1824 413.6
1825 413.6
1826 413.6
1827 413.6
1828 413.6
1829 413.6
1830 413.6
1831 413.6
1832 413.6
1833 413.6
1834 413.6
1835 413.6
1836 413.6
1837 413.6
1838 413.6
1839 413.6
1840 413.6
1841 413.6
1842 413.6
1843 413.6
1844 413.6
1845 413.6
1846 413.6
1847 413.6
1848 413.6
1849 413.6
1850 413.6
1851 413.6
1852 413.6
1853 413.6
1854 413.6
1855 413.6
1856 413.6
1857 413.6
1858 413.6
1859 413.6
1860 413.6
1861 413.6
1862 413.6
1863 413.6
1864 413.6
1865 413.6
1866 413.6
1867 413.6
1868 413.6
1869 413.6
1870 413.6
1871 413.6
1872 413.6
1873 413.6
1874 413.6
1875 413.6
1876 413.6
1877 413.6
1878 413.6
1879 413.6
1880 413.6
1881 413.6
1882 413.6
1883 413.6
1884 413.6
1885 413.6
1886 413.6
1887 413.6
1888 413.6
1889 413.6
1890 413.6
1891 413.6
1892 413.6
1893 413.6
1894 413.6
1895 413.6
1896 413.5
1897 413.4
1898 413.2
1899 413
1900 412.7
1959 399.9
1960 380.5
1961 362.6
1962 345.3
1963 329
1964 313.5
1965 298.5
1966 284.1
1967 270
1968 256.2
1969 242.5
1970 229.3
1971 216.4
1972 203.9
1973 191.6
1974 179.5
1975 167.7
1976 155.8
1977 144.1
1978 132.8
1979 121.9
1980 111.2
1981 101
1982 91.3
1983 82.1
1984 73.6
1985 66
1986 59.2
1987 53.2
1988 48
1989 43.4
1990 39.3
1991 35.6
1992 32.3
1993 29.3
1994 26.7
1995 24.4
1996 22.4
1997 20.7
1998 19.1
1999 17.8
2000 16.5
2001 15.5
2002 14.6
2003 13.8
2004 13.2
2005 12.8
2006 12.4
2007 12.1
2008 11.9
2009 11.7
2010 11.6
2011 11.6
2012 11.5
2013 11.4