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 354.6
1932 353.7
1933 352.8
1934 351.9
1935 351
1936 350.1
1937 349.2
1938 348.3
1939 347.4
1940 346.6
1941 345.7
1942 344.8
1943 343.9
1944 343
1945 342.1
1946 330.4
1947 320.1
1948 309
1949 299.1
1950 288.4
1951 286.7
1952 283
1953 280
1954 276.6
1955 273.8
1956 270.7
1957 267.2
1958 263.4
1959 259.6
1960 255.9
1961 252.1
1962 247.4
1963 242.8
1964 238.1
1965 233.4
1970 225
1975 309
1976 289.1
1977 268.8
1978 244.6
1979 215.8
1980 186.8
1981 162.1
1982 143.3
1983 130.7
1984 123.9
1985 120.9
1986 119.7
1987 118.8
1988 118.1
1989 117.7
1990 117.5
1991 117.6
1992 118.2
1993 119.1
1994 120.4
1995 121.9
1996 123.1
1997 123.6
1998 122.1
1999 117.8
2000 110.5
2001 100.8
2002 89.7
2003 79.2
2004 70.5
2005 63.6
2006 57.9
2007 53.4
2008 49.5
2009 46.4
2010 43.8
2011 41.6
2012 39.7
2013 37.9