Year Years
1800 380
1801 380
1802 380
1803 380
1804 380
1805 380
1806 380
1807 380
1808 380
1809 380
1810 380
1811 380
1812 380
1813 380
1814 380
1815 380
1816 380
1817 380
1818 380
1819 380
1820 380
1821 380
1822 380
1823 380
1824 380
1825 380
1826 380
1827 380
1828 380
1829 380
1830 380
1831 380
1832 380
1833 380
1834 380
1835 380
1836 380
1837 380
1838 380
1839 380
1840 380
1841 380
1842 380
1843 380
1844 380
1845 380
1846 380
1847 380
1848 380
1849 380
1850 380
1851 380
1852 380
1853 380
1854 380
1855 380
1856 380
1857 380
1858 380
1859 380
1860 380
1861 380
1862 380
1863 380
1864 380
1865 380
1866 380
1867 380
1868 380
1869 380
1870 380
1871 380
1872 380
1873 380
1874 380
1875 380
1876 380
1877 380
1878 380
1879 380
1880 380
1881 380
1882 380
1883 380
1884 380
1885 380
1886 380
1887 380
1888 380
1889 380
1890 380
1891 380
1892 380
1893 380
1894 380
1895 379.9
1896 379.9
1897 379.8
1898 379.6
1899 379.4
1900 379.2
1901 378.8
1902 378.5
1903 378
1904 377.5
1905 376.9
1906 376.3
1907 375.6
1908 374.9
1909 374.1
1910 373.3
1911 372.4
1912 371.5
1913 370.6
1914 369.7
1915 368.9
1916 368
1917 367.1
1918 366.2
1919 365.3
1920 364.4
1921 363.5
1922 362.6
1923 361.7
1924 360.8
1925 359.9
1926 359
1927 358.1
1928 357.2
1929 356.4
1930 355.5
1931 353.5
1932 352.6
1933 350.6
1934 349.7
1935 347.7
1936 345.7
1937 344.8
1938 352.8
1939 360.9
1940 369.1
1941 377.4
1942 387
1943 369.7
1953 295.8
1954 290
1955 284.2
1956 278.6
1957 272.9
1958 266.7
1959 260.4
1960 253.7
1961 246.7
1962 239.6
1963 232.3
1964 225.3
1965 218.5
1966 211.9
1967 205.6
1968 199.4
1969 193.3
1970 187.4
1971 181.5
1972 175.6
1973 169.6
1974 163.5
1975 157.4
1976 151.3
1977 145.3
1978 139.2
1979 133.2
1980 127.2
1981 121.2
1982 115.2
1983 109.4
1984 103.8
1985 98.3
1986 93.1
1987 88.1
1988 83.3
1989 78.8
1990 74.4
1991 70.4
1992 66.5
1993 62.8
1994 59.4
1995 56.1
1996 52.9
1997 49.9
1998 47
1999 44.3
2000 41.7
2001 39.3
2002 37
2003 34.8
2004 32.8
2005 30.9
2006 29.2
2007 27.4
2008 25.9
2009 24.4
2010 23
2011 21.7
2012 20.4
2013 19.2