Year Years
1800 28
1801 28
1802 28
1803 28
1804 28
1805 28
1806 28
1807 28
1808 28
1809 28
1810 28
1811 28
1812 28
1813 28
1814 28
1815 28
1816 28
1817 28
1818 28
1819 28
1820 28
1821 28
1822 28
1823 28
1824 28
1825 28
1826 28
1827 28
1828 28
1829 28
1830 28
1831 28
1832 28
1833 28
1834 28
1835 28
1836 28
1837 28
1838 28
1839 28
1840 28
1841 28
1842 28
1843 28
1844 28
1845 28
1846 28
1847 28
1848 28
1849 28
1850 28
1851 28
1852 28
1853 28
1854 28
1855 28
1856 28
1857 28
1858 28
1859 28
1860 28
1861 28
1862 28
1863 28
1864 28
1865 28
1866 28
1867 28
1868 28
1869 28
1870 28
1871 28.03
1872 28.07
1873 28.1
1874 28.13
1875 28.17
1876 28.2
1877 28.23
1878 28.27
1879 28.3
1880 28.33
1881 28.37
1882 28.4
1883 28.43
1884 28.47
1885 28.5
1886 28.53
1887 28.57
1888 28.6
1889 28.63
1890 28.67
1891 28.7
1892 28.73
1893 28.77
1894 28.8
1895 28.84
1896 28.87
1897 28.9
1898 28.94
1899 28.97
1900 29
1901 29.04
1902 29.07
1903 29.1
1904 29.14
1905 29.17
1906 29.2
1907 29.24
1908 29.27
1909 29.3
1910 29.34
1911 29.37
1912 29.4
1913 29.44
1914 29.47
1915 29.5
1916 29.54
1917 29.57
1918 9.98
1919 29.64
1920 29.67
1921 29.7
1922 29.74
1923 29.77
1924 29.8
1925 29.84
1926 30.43
1927 31.03
1928 31.62
1929 32.22
1930 32.81
1931 33.42
1932 34.01
1933 34.62
1934 35.22
1935 35.83
1936 36.43
1937 37.04
1938 37.64
1939 38.26
1940 38.87
1941 39.48
1942 40.09
1943 40.71
1944 41.32
1945 41.94
1946 42.56
1947 43.18
1948 43.8
1949 44.43
1950 45.04
1951 45.39
1952 46.02
1953 46.64
1954 47.25
1955 47.87
1956 48.47
1957 49.06
1958 49.64
1959 50.21
1960 50.76
1961 51.3
1962 51.83
1963 52.31
1964 52.79
1965 53.24
1966 53.68
1967 54.08
1968 54.47
1969 54.85
1970 55.23
1971 55.51
1972 55.87
1973 56.18
1974 56.53
1975 56.74
1976 56.89
1977 57.02
1978 57.28
1979 57.44
1980 57.56
1981 57.66
1982 57.53
1983 57.58
1984 57.73
1985 57.92
1986 58.1
1987 58.28
1988 58.49
1989 58.68
1990 58.81
1991 58.92
1992 59
1993 59.45
1994 59.27
1995 59.49
1996 59.51
1997 59.09
1998 59.39
1999 59.33
2000 59.34
2001 59.24
2002 59.33
2003 59.55
2004 59.85
2005 60.15
2006 60.47
2007 60.8
2008 61.27
2009 61.72
2010 62.16
2011 62.91
2012 63.71
2013 64.35
2014 64.87
2015 65.43
2016 66.01
2017 66.32
2018 66.62