Year Years
1800 378.8
1801 378.8
1802 378.8
1803 378.8
1804 378.8
1805 378.8
1806 378.8
1807 378.8
1808 378.8
1809 378.8
1810 378.8
1811 378.8
1812 378.8
1813 378.8
1814 378.8
1815 378.8
1816 378.8
1817 378.8
1818 378.8
1819 378.8
1820 378.8
1821 378.8
1822 378.8
1823 378.8
1824 378.8
1825 378.8
1826 378.8
1827 378.8
1828 378.8
1829 378.8
1830 378.8
1831 378.8
1832 378.8
1833 378.8
1834 378.8
1835 378.8
1836 378.8
1837 378.8
1838 378.8
1839 378.8
1840 378.8
1841 378.8
1842 378.8
1843 378.8
1844 378.8
1845 378.8
1846 378.8
1847 378.8
1848 378.8
1849 378.8
1850 378.8
1851 378.8
1852 378.8
1853 378.8
1854 378.8
1855 378.8
1856 378.8
1857 378.8
1858 378.8
1859 378.8
1860 378.8
1861 378.8
1862 378.8
1863 378.8
1864 378.8
1865 378.8
1866 378.8
1867 378.8
1868 378.8
1869 378.8
1870 378.8
1871 378.8
1872 378.8
1873 378.8
1874 378.8
1875 378.8
1876 378.8
1877 378.8
1878 378.8
1879 378.8
1880 378.8
1881 378.8
1882 378.8
1883 378.8
1884 378.8
1885 378.8
1886 378.8
1887 378.8
1888 378.8
1889 378.8
1890 378.8
1891 378.8
1892 378.8
1893 378.8
1894 378.8
1895 378.8
1896 378.7
1897 378.6
1898 378.4
1899 378.2
1900 378
1901 377.6
1902 377.3
1903 376.8
1904 376.3
1905 375.8
1906 375.1
1907 374.4
1908 373.7
1909 372.9
1910 372.1
1911 371.2
1912 370.4
1913 369.5
1914 368.6
1915 367.7
1916 366.8
1917 365.9
1918 365
1919 364.1
1920 363.2
1921 356.6
1922 348.9
1923 342.5
1924 335
1925 328.7
1926 321.5
1927 315.4
1928 308.3
1929 302.4
1930 296.5
1931 289.7
1932 284
1933 277.4
1934 271.8
1935 265.4
1936 259.9
1937 254.6
1938 248.4
1939 243.2
1940 237.1
1941 232.1
1942 226.2
1943 221.3
1944 215.5
1945 210.7
1946 206
1947 200.5
1948 195.9
1949 190.5
1950 186
1960 158.5
1970 81.22
1983 30.4
1984 29.4
1985 27
1986 24.9
1987 23
1988 21.2
1989 19.7
1990 18.3
1991 17
1992 16
1993 15
1994 14.2
1995 13.3
1996 12.5
1997 11.6
1998 10.7
1999 9.9
2000 9.2
2001 8.6
2002 8.3
2003 8.2
2004 8.2
2005 8.2
2006 8.2
2007 8.2
2008 8.1
2009 7.8
2010 7.5
2011 7.2
2012 6.9
2013 6.6