Year Total
1800 7.03
1801 7.03
1802 7.03
1803 7.03
1804 7.03
1805 7.03
1806 7.03
1807 7.03
1808 7.03
1809 7.03
1810 7.03
1811 7.02
1812 7.02
1813 7.02
1814 7.02
1815 7.02
1816 7.02
1817 7.02
1818 7.02
1819 7.02
1820 7.02
1821 7.02
1822 7.02
1823 7.02
1824 7.02
1825 7.02
1826 7.02
1827 7.02
1828 7.02
1829 7.02
1830 7.02
1831 7.02
1832 7.01
1833 7.01
1834 7.01
1835 7.01
1836 7.01
1837 7.01
1838 7.01
1839 7.01
1840 7.01
1841 7.01
1842 7.01
1843 7.01
1844 7.01
1845 7.01
1846 7.01
1847 7.01
1848 7.01
1849 7.01
1850 7.01
1851 7.01
1852 7.01
1853 7
1854 7
1855 7
1856 7
1857 7
1858 7
1859 7
1860 7
1861 7
1862 7
1863 7
1864 7
1865 7
1866 7
1867 7
1868 7
1869 7
1870 7
1871 7
1872 7
1873 6.99
1874 6.99
1875 6.99
1876 6.99
1877 6.99
1878 6.99
1879 6.99
1880 6.99
1881 6.99
1882 6.99
1883 6.99
1884 6.99
1885 6.99
1886 6.99
1887 6.99
1888 6.99
1889 6.99
1890 6.99
1891 6.99
1892 6.99
1893 6.99
1894 6.98
1895 6.98
1896 6.98
1897 6.98
1898 6.98
1899 6.98
1900 6.98
1901 6.98
1902 6.98
1903 6.98
1904 6.98
1905 6.98
1906 6.98
1907 6.98
1908 6.98
1909 6.98
1910 6.98
1911 6.98
1912 6.98
1913 6.98
1914 6.98
1915 6.97
1916 6.97
1917 6.97
1918 6.97
1919 6.97
1920 6.97
1921 6.97
1922 6.97
1923 6.97
1924 6.97
1925 6.97
1926 6.97
1927 6.97
1928 6.98
1929 6.98
1930 6.98
1931 6.98
1932 6.99
1933 6.99
1934 6.99
1935 6.99
1936 7
1937 7
1938 7
1939 7
1940 7.01
1941 7.01
1942 7.01
1943 7.01
1944 7.02
1945 7.02
1946 7.02
1947 7.02
1948 7.03
1949 7.03
1950 7.03
1951 7.01
1952 6.97
1953 6.95
1954 6.94
1955 6.94
1956 6.95
1957 6.97
1958 7.01
1959 7.05
1960 7.09
1961 7.13
1962 7.17
1963 7.19
1964 7.19
1965 7.17
1966 7.1
1967 7
1968 6.86
1969 6.69
1970 6.5
1971 6.29
1972 6.09
1973 5.9
1974 5.72
1975 5.56
1976 5.41
1977 5.28
1978 5.16
1979 5.04
1980 4.92
1981 4.8
1982 4.69
1983 4.58
1984 4.47
1985 4.36
1986 4.25
1987 4.13
1988 4
1989 3.87
1990 3.74
1991 3.6
1992 3.47
1993 3.34
1994 3.21
1995 3.1
1996 3.01
1997 2.93
1998 2.86
1999 2.81
2000 2.77
2001 2.72
2002 2.67
2003 2.6
2004 2.53
2005 2.45
2006 2.37
2007 2.29
2008 2.23
2009 2.18
2010 2.14
2011 2.12
2012 2.09
2013 2.08
2014 2.07
2015 2.05
2016 2.03
2017 2.01
2018 1.99