Year Years
1800 28.7
1801 28.7
1802 28.7
1803 28.7
1804 28.7
1805 28.7
1806 28.7
1807 28.7
1808 28.7
1809 28.7
1810 28.7
1811 28.7
1812 28.7
1813 28.7
1814 28.7
1815 28.7
1816 28.7
1817 28.7
1818 28.7
1819 28.7
1820 28.7
1821 28.7
1822 28.7
1823 28.7
1824 28.7
1825 28.7
1826 28.7
1827 28.7
1828 28.7
1829 28.7
1830 28.7
1831 28.7
1832 28.7
1833 28.7
1834 28.7
1835 28.7
1836 28.7
1837 28.7
1838 28.7
1839 28.7
1840 28.7
1841 28.7
1842 28.7
1843 28.7
1844 28.7
1845 28.7
1846 28.7
1847 28.7
1848 28.7
1849 28.7
1850 28.7
1851 28.7
1852 28.7
1853 28.7
1854 28.7
1855 28.7
1856 28.7
1857 28.7
1858 28.7
1859 28.7
1860 28.7
1861 28.7
1862 28.7
1863 28.7
1864 28.7
1865 28.7
1866 28.7
1867 28.7
1868 28.7
1869 28.7
1870 28.7
1871 28.71
1872 28.72
1873 28.74
1874 28.75
1875 28.76
1876 28.77
1877 28.78
1878 28.8
1879 28.81
1880 28.82
1881 28.83
1882 28.84
1883 28.86
1884 28.87
1885 28.88
1886 28.89
1887 28.9
1888 28.91
1889 28.93
1890 28.94
1891 28.95
1892 28.96
1893 28.97
1894 28.99
1895 29
1896 29.01
1897 29.02
1898 29.03
1899 29.05
1900 29.06
1901 29.07
1902 29.08
1903 29.09
1904 29.11
1905 29.12
1906 29.13
1907 29.14
1908 29.15
1909 29.17
1910 29.18
1911 29.19
1912 29.2
1913 29.21
1914 29.22
1915 29.24
1916 29.25
1917 29.26
1918 25.88
1919 29.28
1920 29.3
1921 29.31
1922 29.32
1923 29.33
1924 29.34
1925 29.36
1926 29.37
1927 29.38
1928 29.39
1929 29.4
1930 29.42
1931 30.18
1932 30.94
1933 31.69
1934 32.45
1935 33.21
1936 33.98
1937 34.74
1938 35.5
1939 36.26
1940 37.03
1941 37.79
1942 38.56
1943 39.32
1944 40.09
1945 40.85
1946 41.62
1947 42.39
1948 43.15
1949 43.93
1950 44.7
1951 45.19
1952 46.15
1953 47.09
1954 48.02
1955 48.93
1956 49.83
1957 50.71
1958 51.57
1959 52.41
1960 53.22
1961 53.99
1962 54.72
1963 55.42
1964 56.06
1965 56.65
1966 57.19
1967 57.67
1968 58.11
1969 58.51
1970 58.85
1971 59.45
1972 59.85
1973 60.67
1974 61.28
1975 61.87
1976 62.52
1977 63.14
1978 63.7
1979 64.2
1980 64.81
1981 58.66
1982 62.44
1983 61.07
1984 63
1985 64.62
1986 64.57
1987 66.06
1988 67.44
1989 65.86
1990 68.17
1991 68.48
1992 69.18
1993 69.53
1994 69.83
1995 70.26
1996 70.61
1997 71.07
1998 71.31
1999 71.87
2000 72.19
2001 71.93
2002 72.65
2003 72.76
2004 72.91
2005 73.07
2006 73.34
2007 73.53
2008 73.77
2009 73.83
2010 74.11
2011 74.35
2012 74.51
2013 74.61
2014 74.83
2015 75.04
2016 75.27
2017 75.51
2018 75.75