Year Total
1776 5.42
1785 5.39
1797 5.2
1798 5.08
1799 5.09
1800 4.92
1801 5.07
1802 5.23
1803 4.78
1804 5.24
1805 5.21
1806 4.84
1807 4.97
1808 4.16
1809 3.69
1810 5.1
1811 4.66
1812 4.95
1813 4.6
1814 4.72
1815 4.84
1816 4.82
1817 4.84
1818 4.78
1819 4.51
1820 4.55
1821 5.34
1822 4.59
1823 5.21
1824 4.84
1825 4.83
1826 4.89
1827 4.77
1828 5.12
1829 4.98
1830 4.85
1831 4.58
1832 4.47
1833 3.96
1834 4.75
1835 4.57
1836 4.17
1837 4.17
1838 4.32
1839 4.47
1840 4.59
1841 4.56
1842 4.96
1843 4.77
1844 4.64
1845 4.76
1846 4.39
1847 4.46
1848 4.84
1849 4.92
1850 4.78
1851 5.17
1852 4.79
1853 4.8
1854 5.02
1855 4.82
1856 4.86
1857 4.48
1858 4.87
1859 4.74
1860 4.84
1861 5.2
1862 5.03
1863 4.85
1864 5.28
1865 4.79
1866 4.46
1867 4.47
1868 3.4
1869 4.52
1870 4.86
1871 4.95
1872 4.87
1873 4.97
1874 5.12
1875 4.95
1876 4.97
1877 5.19
1878 4.81
1879 5.14
1880 5.01
1881 4.79
1882 4.99
1883 4.96
1884 5.04
1885 4.79
1886 4.98
1887 5.17
1888 5.07
1889 4.89
1890 4.83
1891 5.04
1892 4.65
1893 4.43
1894 4.59
1895 4.87
1896 4.8
1897 4.77
1898 5.07
1899 4.96
1900 4.83
1901 4.92
1902 4.79
1903 4.62
1904 4.85
1905 4.67
1906 4.81
1907 4.76
1908 4.65
1909 4.72
1910 4.6
1911 4.46
1912 4.45
1913 4.15
1914 4.13
1915 3.89
1916 3.69
1917 3.71
1918 3.6
1919 2.87
1920 3.76
1921 3.58
1922 3.43
1923 3.44
1924 3.22
1925 3.17
1926 3.02
1927 2.92
1928 2.92
1929 2.83
1930 2.75
1931 2.59
1932 2.46
1933 2.27
1934 2.33
1935 2.37
1936 2.31
1937 2.52
1938 2.52
1939 2.56
1940 2.15
1941 2.9
1942 2
1943 2.46
1944 2.56
1945 3.07
1946 3.41
1947 3.47
1948 3.47
1949 3.33
1950 3.16
1951 3.01
1952 3.06
1953 2.96
1954 2.93
1955 2.93
1956 2.91
1957 2.86
1958 2.68
1959 2.75
1960 2.71
1961 2.65
1962 2.66
1963 2.66
1964 2.58
1965 2.46
1966 2.41
1967 2.32
1968 2.15
1969 1.94
1970 1.83
1971 1.7
1972 1.59
1973 1.5
1974 1.62
1975 1.69
1976 1.72
1977 1.69
1978 1.65
1979 1.64
1980 1.63
1981 1.65
1982 1.72
1983 1.74
1984 1.7
1985 1.64
1986 1.6
1987 1.59
1988 1.7
1989 1.71
1990 1.79
1991 1.8
1992 1.85
1993 1.81
1994 1.85
1995 1.81
1996 1.76
1997 1.75
1998 1.71
1999 1.73
2000 1.73
2001 1.73
2002 1.72
2003 1.76
2004 1.8
2005 1.8
2006 1.84
2007 1.83
2008 1.85
2009 1.86
2010 1.87
2011 1.83
2012 1.8
2013 1.853
2014 1.854
2015 1.855
2016 1.856
2017 1.858
2018 1.859
2019 1.861
2020 1.862
2021 1.864
2022 1.865
2023 1.866
2024 1.868
2030 1.874
2040 1.884
2050 1.892
2070 1.902
2080 1.902
2099 1.906