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 369.2
1896 358.5
1897 349.2
1898 338.8
1899 328.6
1900 318.4
1901 313.8
1902 309.2
1903 304.6
1904 299.9
1905 295.3
1906 290.7
1907 286
1908 281.4
1909 276.7
1910 272.1
1911 265.6
1912 260.1
1913 253.6
1914 247.3
1915 242
1916 235.8
1917 230.7
1918 224.7
1919 218.8
1920 213.8
1921 208
1922 202.3
1923 197.6
1924 192.1
1925 187.4
1926 182
1927 176.7
1928 172.2
1929 167.1
1930 162
1931 158.5
1932 155
1933 151.6
1934 148.3
1935 144.9
1936 141.6
1937 137.7
1938 134.4
1939 130.6
1940 127.5
1950 88.5
1951 79.22
1952 61.81
1953 49.74
1954 42.62
1955 39.24
1956 36.14
1957 35.35
1958 33.16
1959 29.61
1960 28.4
1961 27.81
1962 30.08
1963 29.25
1964 27.57
1965 31.86
1966 29.73
1967 29.55
1968 29.16
1969 30.5
1970 28.2
1971 28.41
1972 27.06
1973 27.56
1974 26.7
1975 25.75
1976 25.26
1977 24.79
1978 22.84
1979 21.08
1980 21.6
1981 18.5
1982 18
1983 17.6
1984 17.3
1985 17
1986 16.7
1987 16.1
1988 15.5
1989 15.1
1990 14.6
1991 14
1992 13.2
1993 12.3
1994 11.2
1995 10.2
1996 9.2
1997 8.4
1998 7.6
1999 7
2000 6.6
2001 6.2
2002 6
2003 5.7
2004 5.5
2005 5.2
2006 5
2007 4.7
2008 4.5
2009 4.3
2010 4.1
2011 3.9
2012 3.8
2013 3.6