Year Years
1800 28.8
1801 28.8
1802 28.8
1803 28.8
1804 28.8
1805 28.8
1806 28.8
1807 28.8
1808 28.8
1809 28.8
1810 28.8
1811 28.8
1812 28.8
1813 28.8
1814 28.8
1815 28.8
1816 28.8
1817 28.8
1818 28.8
1819 28.8
1820 28.8
1821 28.8
1822 28.8
1823 28.8
1824 28.8
1825 28.8
1826 28.8
1827 28.8
1828 28.8
1829 28.8
1830 28.8
1831 28.8
1832 28.8
1833 28.8
1834 28.8
1835 28.8
1836 28.8
1837 28.8
1838 28.8
1839 28.8
1840 28.8
1841 28.8
1842 28.8
1843 28.8
1844 28.8
1845 28.8
1846 28.8
1847 28.8
1848 28.8
1849 28.8
1850 28.8
1851 28.8
1852 28.8
1853 28.8
1854 28.8
1855 28.8
1856 28.8
1857 28.8
1858 28.8
1859 28.8
1860 28.8
1861 28.8
1862 28.8
1863 28.8
1864 28.8
1865 28.8
1866 28.8
1867 28.8
1868 28.8
1869 28.8
1870 28.8
1871 28.89
1872 28.98
1873 29.08
1874 29.17
1875 29.26
1876 29.35
1877 29.44
1878 29.54
1879 29.63
1880 29.72
1881 29.81
1882 29.91
1883 30
1884 30.09
1885 30.18
1886 30.27
1887 30.37
1888 30.46
1889 30.55
1890 30.64
1891 30.73
1892 30.83
1893 30.92
1894 31.01
1895 31.1
1896 31.2
1897 31.29
1898 31.38
1899 31.47
1900 31.56
1901 31.66
1902 31.75
1903 31.84
1904 31.93
1905 32.02
1906 32.12
1907 32.21
1908 32.3
1909 32.39
1910 32.49
1911 32.58
1912 32.67
1913 32.76
1914 32.85
1915 32.95
1916 33.04
1917 33.13
1918 21.29
1919 33.31
1920 33.41
1921 33.5
1922 33.59
1923 33.68
1924 33.78
1925 33.87
1926 33.96
1927 34.05
1928 34.14
1929 34.24
1930 34.33
1931 34.42
1932 34.51
1933 34.6
1934 34.7
1935 34.79
1936 34.88
1937 34.97
1938 35.07
1939 35.16
1940 35.25
1941 35.34
1942 35.43
1943 35.53
1944 35.62
1945 35.71
1946 35.8
1947 35.89
1948 35.99
1949 36.08
1950 36.17
1951 36.49
1952 37.02
1953 37.57
1954 38.14
1955 38.72
1956 39.3
1957 39.9
1958 40.5
1959 41.1
1960 41.69
1961 42.27
1962 42.86
1963 43.42
1964 44
1965 44.61
1966 45.28
1967 46.02
1968 46.84
1969 47.76
1970 48.77
1971 49.4
1972 49.94
1973 50.41
1974 50.85
1975 51.19
1976 51.57
1977 51.98
1978 52.41
1979 52.85
1980 53.29
1981 53.87
1982 54.48
1983 55.17
1984 55.85
1985 56.35
1986 57.14
1987 57.87
1988 58.56
1989 59.22
1990 59.9
1991 60.46
1992 61.1
1993 61.7
1994 62.11
1995 62.9
1996 63.92
1997 64.43
1998 65.12
1999 66.05
2000 65.62
2001 67.23
2002 67.97
2003 68.51
2004 69.09
2005 69.56
2006 70.17
2007 70.72
2008 71.28
2009 71.6
2010 72.13
2011 72.54
2012 72.87
2013 73.16
2014 73.46
2015 73.77
2016 74.07
2017 74.46
2018 74.83