Year Total
1800 7.13
1801 7.13
1802 7.13
1803 7.13
1804 7.13
1805 7.13
1806 7.13
1807 7.13
1808 7.13
1809 7.13
1810 7.13
1811 7.13
1812 7.13
1813 7.13
1814 7.13
1815 7.13
1816 7.13
1817 7.13
1818 7.13
1819 7.13
1820 7.13
1821 7.13
1822 7.13
1823 7.13
1824 7.13
1825 7.13
1826 7.13
1827 7.13
1828 7.13
1829 7.13
1830 7.13
1831 7.13
1832 7.13
1833 7.13
1834 7.13
1835 7.13
1836 7.13
1837 7.13
1838 7.13
1839 7.13
1840 7.13
1841 7.13
1842 7.13
1843 7.13
1844 7.13
1845 7.13
1846 7.13
1847 7.13
1848 7.13
1849 7.13
1850 7.13
1851 7.13
1852 7.13
1853 7.13
1854 7.13
1855 7.13
1856 7.13
1857 7.13
1858 7.13
1859 7.13
1860 7.13
1861 7.13
1862 7.13
1863 7.13
1864 7.13
1865 7.13
1866 7.13
1867 7.13
1868 7.13
1869 7.13
1870 7.13
1871 7.13
1872 7.13
1873 7.13
1874 7.13
1875 7.13
1876 7.13
1877 7.13
1878 7.13
1879 7.13
1880 7.13
1881 7.13
1882 7.13
1883 7.13
1884 7.13
1885 7.13
1886 7.13
1887 7.13
1888 7.13
1889 7.13
1890 7.13
1891 7.13
1892 7.13
1893 7.13
1894 7.13
1895 7.13
1896 7.13
1897 7.13
1898 7.13
1899 7.13
1900 7.13
1901 7.13
1902 7.13
1903 7.13
1904 7.13
1905 7.13
1906 7.13
1907 7.13
1908 7.13
1909 7.13
1910 7.13
1911 7.13
1912 7.13
1913 7.13
1914 7.13
1915 7.13
1916 7.13
1917 7.13
1918 7.13
1919 7.13
1920 7.13
1921 7.13
1922 7.13
1923 7.13
1924 7.13
1925 7.13
1926 7.17
1927 7.21
1928 7.25
1929 7.29
1930 7.33
1931 7.37
1932 7.41
1933 7.45
1934 7.48
1935 7.52
1936 7.56
1937 7.6
1938 7.64
1939 7.68
1940 7.72
1941 7.76
1942 7.8
1943 7.84
1944 7.88
1945 7.91
1946 7.95
1947 7.99
1948 8.03
1949 8.07
1950 8.11
1951 7.88
1952 7.44
1953 7.07
1954 6.76
1955 6.52
1956 6.34
1957 6.23
1958 6.18
1959 6.19
1960 6.25
1961 6.36
1962 6.51
1963 6.69
1964 6.87
1965 7.04
1966 7.19
1967 7.3
1968 7.36
1969 7.38
1970 7.36
1971 7.31
1972 7.23
1973 7.15
1974 7.07
1975 6.99
1976 6.92
1977 6.83
1978 6.75
1979 6.66
1980 6.57
1981 6.49
1982 6.41
1983 6.34
1984 6.28
1985 6.22
1986 6.16
1987 6.11
1988 6.04
1989 5.97
1990 5.88
1991 5.79
1992 5.7
1993 5.61
1994 5.52
1995 5.42
1996 5.33
1997 5.22
1998 5.11
1999 5
2000 4.89
2001 4.8
2002 4.71
2003 4.64
2004 4.59
2005 4.56
2006 4.55
2007 4.55
2008 4.55
2009 4.56
2010 4.56
2011 4.56
2012 4.54
2013 4.52
2014 4.48
2015 4.43
2016 4.37
2017 4.31
2018 4.25