Year Total
1800 6.19
1801 6.19
1802 6.19
1803 6.19
1804 6.19
1805 6.19
1806 6.19
1807 6.19
1808 6.19
1809 6.19
1810 6.19
1811 6.19
1812 6.19
1813 6.19
1814 6.19
1815 6.19
1816 6.19
1817 6.19
1818 6.19
1819 6.19
1820 6.19
1821 6.19
1822 6.19
1823 6.19
1824 6.19
1825 6.19
1826 6.19
1827 6.19
1828 6.19
1829 6.19
1830 6.19
1831 6.19
1832 6.19
1833 6.19
1834 6.19
1835 6.19
1836 6.19
1837 6.19
1838 6.19
1839 6.19
1840 6.19
1841 6.19
1842 6.19
1843 6.19
1844 6.19
1845 6.19
1846 6.19
1847 6.19
1848 6.19
1849 6.19
1850 6.19
1851 6.19
1852 6.19
1853 6.19
1854 6.19
1855 6.19
1856 6.19
1857 6.19
1858 6.19
1859 6.19
1860 6.19
1861 6.19
1862 6.19
1863 6.19
1864 6.19
1865 6.19
1866 6.19
1867 6.19
1868 6.19
1869 6.19
1870 6.19
1871 6.19
1872 6.19
1873 6.19
1874 6.19
1875 6.19
1876 6.19
1877 6.19
1878 6.19
1879 6.19
1880 6.19
1881 6.19
1882 6.19
1883 6.19
1884 6.19
1885 6.19
1886 6.19
1887 6.19
1888 6.19
1889 6.19
1890 6.19
1891 6.19
1892 6.19
1893 6.19
1894 6.19
1895 6.19
1896 6.19
1897 6.19
1898 6.19
1899 6.19
1900 6.19
1901 6.21
1902 6.23
1903 6.25
1904 6.27
1905 6.29
1906 6.32
1907 6.34
1908 6.34
1909 6.34
1910 6.34
1911 6.35
1912 6.35
1913 6.35
1914 6.35
1915 6.35
1916 6.35
1917 6.35
1918 6.36
1919 6.38
1920 6.39
1921 6.41
1922 6.42
1923 6.43
1924 6.44
1925 6.45
1926 6.46
1927 6.47
1928 6.42
1929 6.37
1930 6.33
1931 6.28
1932 6.24
1933 6.22
1934 6.19
1935 6.17
1936 6.15
1937 6.13
1938 6.13
1939 6.12
1940 6.12
1941 6.11
1942 6.11
1943 6.13
1944 6.16
1945 6.19
1946 6.22
1947 6.25
1948 6.42
1949 6.6
1950 6.77
1951 6.77
1952 6.76
1953 6.75
1954 6.75
1955 6.76
1956 6.77
1957 6.78
1958 6.79
1959 6.8
1960 6.81
1961 6.8
1962 6.78
1963 6.74
1964 6.67
1965 6.57
1966 6.43
1967 6.25
1968 6.03
1969 5.8
1970 5.55
1971 5.3
1972 5.07
1973 4.86
1974 4.68
1975 4.52
1976 4.4
1977 4.28
1978 4.18
1979 4.07
1980 3.97
1981 3.86
1982 3.74
1983 3.63
1984 3.53
1985 3.42
1986 3.32
1987 3.23
1988 3.14
1989 3.07
1990 2.99
1991 2.93
1992 2.86
1993 2.79
1994 2.73
1995 2.66
1996 2.6
1997 2.54
1998 2.48
1999 2.43
2000 2.39
2001 2.35
2002 2.31
2003 2.27
2004 2.24
2005 2.2
2006 2.16
2007 2.12
2008 2.08
2009 2.04
2010 2.01
2011 1.98
2012 1.95
2013 1.92
2014 1.9
2015 1.87
2016 1.85
2017 1.83
2018 1.82