Year Total
1800 5.22
1801 5.22
1802 5.22
1803 5.22
1804 5.22
1805 5.22
1806 5.22
1807 5.22
1808 5.22
1809 5.22
1810 5.22
1811 5.22
1812 5.22
1813 5.22
1814 5.22
1815 5.22
1816 5.22
1817 5.22
1818 5.22
1819 5.22
1820 5.22
1821 5.22
1822 5.22
1823 5.22
1824 5.22
1825 5.22
1826 5.22
1827 5.22
1828 5.22
1829 5.22
1830 5.22
1831 5.22
1832 5.22
1833 5.22
1834 5.22
1835 5.22
1836 5.22
1837 5.22
1838 5.22
1839 5.22
1840 5.22
1841 5.22
1842 5.22
1843 5.22
1844 5.22
1845 5.22
1846 5.22
1847 5.22
1848 5.22
1849 5.22
1850 5.22
1851 5.08
1852 4.94
1853 4.8
1854 4.66
1855 4.52
1856 4.38
1857 4.24
1858 4.11
1859 3.97
1860 4.23
1861 4.29
1862 4.29
1863 4.07
1864 4.82
1865 4.64
1866 4.19
1867 4.25
1868 4.48
1869 4.56
1870 4.61
1871 4.49
1872 4.29
1873 4.36
1874 4.6
1875 5.2
1876 4.96
1877 4.74
1878 4.22
1879 4.97
1880 5.05
1881 5.56
1882 5.41
1883 5.74
1884 5.55
1885 5.78
1886 5.65
1887 5.49
1888 5.68
1889 5.44
1890 5.16
1891 5.67
1892 5.23
1893 5.43
1894 5.48
1895 5.67
1896 5.45
1897 5.75
1898 4.92
1899 5.63
1900 5.2
1901 5.27
1902 5.23
1903 5.37
1904 5.37
1905 5.13
1906 5.35
1907 5.51
1908 5.4
1909 5.51
1910 5.27
1911 5.67
1912 5.82
1913 5.64
1914 5.64
1915 5.43
1916 4.84
1917 4.25
1918 3.67
1919 3.08
1920 4.52
1921 5.12
1922 4.98
1923 4.88
1924 4.92
1925 4.72
1926 4.66
1927 4.57
1928 4.65
1929 4.57
1930 4.69
1931 4.46
1932 4.81
1933 4.3
1934 4.34
1935 4.11
1936 4.22
1937 4.13
1938 3.97
1939 3.79
1940 3.55
1941 3.08
1942 2.87
1943 3.14
1944 2.91
1945 2.63
1946 3.32
1947 3.14
1948 3.2
1949 3.7
1950 3.58
1951 3.43
1952 3.31
1953 3.19
1954 3.08
1955 2.98
1956 2.86
1957 2.73
1958 2.59
1959 2.45
1960 2.34
1961 2.25
1962 2.22
1963 2.25
1964 2.33
1965 2.46
1966 2.59
1967 2.71
1968 2.79
1969 2.83
1970 2.82
1971 2.79
1972 2.73
1973 2.69
1974 2.64
1975 2.61
1976 2.58
1977 2.54
1978 2.5
1979 2.45
1980 2.4
1981 2.36
1982 2.32
1983 2.3
1984 2.29
1985 2.27
1986 2.25
1987 2.19
1988 2.11
1989 2
1990 1.87
1991 1.74
1992 1.61
1993 1.51
1994 1.43
1995 1.37
1996 1.34
1997 1.32
1998 1.31
1999 1.31
2000 1.31
2001 1.31
2002 1.32
2003 1.33
2004 1.36
2005 1.38
2006 1.4
2007 1.43
2008 1.45
2009 1.46
2010 1.47
2011 1.48
2012 1.49
2013 1.49
2014 1.5
2015 1.51
2016 1.52
2017 1.53
2018 1.54