Year Total
1800 7.2
1801 7.2
1802 7.2
1803 7.2
1804 7.2
1805 7.2
1806 7.2
1807 7.2
1808 7.2
1809 7.2
1810 7.2
1811 7.2
1812 7.2
1813 7.2
1814 7.2
1815 7.2
1816 7.2
1817 7.2
1818 7.2
1819 7.2
1820 7.2
1821 7.2
1822 7.2
1823 7.2
1824 7.2
1825 7.2
1826 7.2
1827 7.2
1828 7.2
1829 7.2
1830 7.2
1831 7.2
1832 7.2
1833 7.2
1834 7.2
1835 7.2
1836 7.2
1837 7.2
1838 7.2
1839 7.2
1840 7.2
1841 7.2
1842 7.2
1843 7.2
1844 7.2
1845 7.2
1846 7.2
1847 7.2
1848 7.2
1849 7.2
1850 7.2
1851 7.2
1852 7.2
1853 7.2
1854 7.2
1855 7.2
1856 7.2
1857 7.2
1858 7.2
1859 7.2
1860 7.2
1861 7.2
1862 7.2
1863 7.2
1864 7.2
1865 7.2
1866 7.2
1867 7.2
1868 7.2
1869 7.2
1870 7.2
1871 7.2
1872 7.2
1873 7.2
1874 7.2
1875 7.2
1876 7.2
1877 7.2
1878 7.2
1879 7.2
1880 7.2
1881 7.2
1882 7.2
1883 7.2
1884 7.2
1885 7.2
1886 7.2
1887 7.2
1888 7.2
1889 7.2
1890 7.2
1891 7.2
1892 7.2
1893 7.2
1894 7.2
1895 7.2
1896 7.2
1897 7.2
1898 7.2
1899 7.2
1900 7.2
1901 7.2
1902 7.2
1903 7.2
1904 7.2
1905 7.2
1906 7.2
1907 7.2
1908 7.2
1909 7.2
1910 7.2
1911 7.2
1912 7.2
1913 7.2
1914 7.2
1915 7.2
1916 7.2
1917 7.2
1918 7.2
1919 7.2
1920 7.2
1921 7.2
1922 7.2
1923 7.2
1924 7.2
1925 7.2
1926 7.2
1927 7.2
1928 7.2
1929 7.2
1930 7.2
1931 7.2
1932 7.2
1933 7.2
1934 7.2
1935 7.2
1936 7.19
1937 7.19
1938 7.19
1939 7.19
1940 7.19
1941 7.19
1942 7.18
1943 7.18
1944 7.18
1945 7.17
1946 7.17
1947 7.17
1948 7.16
1949 7.16
1950 7.16
1951 7.17
1952 7.19
1953 7.21
1954 7.22
1955 7.23
1956 7.23
1957 7.22
1958 7.21
1959 7.2
1960 7.2
1961 7.24
1962 7.31
1963 7.4
1964 7.52
1965 7.65
1966 7.78
1967 7.91
1968 8.01
1969 8.09
1970 8.13
1971 8.15
1972 8.14
1973 8.1
1974 8.05
1975 7.97
1976 7.87
1977 7.74
1978 7.58
1979 7.41
1980 7.22
1981 7.02
1982 6.83
1983 6.63
1984 6.44
1985 6.24
1986 6.02
1987 5.79
1988 5.53
1989 5.26
1990 4.97
1991 4.67
1992 4.38
1993 4.11
1994 3.86
1995 3.64
1996 3.44
1997 3.27
1998 3.11
1999 2.98
2000 2.86
2001 2.75
2002 2.67
2003 2.6
2004 2.54
2005 2.49
2006 2.46
2007 2.44
2008 2.43
2009 2.42
2010 2.41
2011 2.4
2012 2.39
2013 2.37
2014 2.35
2015 2.31
2016 2.27
2017 2.24
2018 2.2