Year Years 1800 28.2 1801 28.2 1802 28.2 1803 28.2 1804 28.2 1805 28.2 1806 28.2 1807 28.2 1808 28.2 1809 28.2 1810 28.2 1811 28.2 1812 28.2 1813 28.2 1814 28.2 1815 28.2 1816 28.2 1817 28.2 1818 28.2 1819 28.2 1820 28.2 1821 28.2 1822 28.2 1823 28.2 1824 28.2 1825 28.2 1826 28.2 1827 28.2 1828 28.2 1829 28.2 1830 28.2 1831 28.2 1832 28.2 1833 28.2 1834 28.2 1835 28.2 1836 28.2 1837 28.2 1838 28.2 1839 28.2 1840 28.2 1841 28.2 1842 28.2 1843 28.2 1844 28.2 1845 28.2 1846 28.2 1847 28.2 1848 28.2 1849 28.2 1850 28.2 1851 28.2 1852 28.2 1853 28.2 1854 28.2 1855 28.2 1856 28.2 1857 28.2 1858 28.2 1859 28.2 1860 28.2 1861 28.2 1862 28.2 1863 28.2 1864 28.2 1865 28.2 1866 28.2 1867 28.2 1868 28.2 1869 28.2 1870 28.2 1871 28.2 1872 28.21 1873 28.21 1874 28.21 1875 28.21 1876 28.22 1877 28.22 1878 28.22 1879 28.22 1880 28.23 1881 28.23 1882 28.23 1883 28.24 1884 28.24 1885 28.24 1886 28.24 1887 28.25 1888 28.25 1889 28.25 1890 28.25 1891 28.26 1892 28.26 1893 8.02 1894 28.26 1895 28.27 1896 28.27 1897 28.27 1898 28.28 1899 28.28 1900 28.28 1901 28.28 1902 28.29 1903 28.29 1904 28.29 1905 28.29 1906 28.3 1907 28.3 1908 28.3 1909 28.31 1910 28.31 1911 28.31 1912 28.31 1913 28.32 1914 28.32 1915 28.32 1916 28.32 1917 28.33 1918 5.87 1919 28.33 1920 28.33 1921 28.34 1922 28.34 1923 28.34 1924 28.35 1925 28.35 1926 29.55 1927 30.75 1928 31.95 1929 33.15 1930 34.35 1931 35.54 1932 36.74 1933 37.94 1934 39.14 1935 40.34 1936 41.54 1937 42.74 1938 43.94 1939 45.15 1940 46.35 1941 47.55 1942 48.74 1943 49.95 1944 51.15 1945 52.35 1946 53.56 1947 54.76 1948 55.96 1949 57.17 1950 58.37 1951 58.56 1952 58.93 1953 59.3 1954 59.66 1955 60.04 1956 60.42 1957 60.79 1958 61.17 1959 61.55 1960 61.93 1961 62.31 1962 62.68 1963 63.04 1964 63.4 1965 63.76 1966 64.11 1967 64.47 1968 64.81 1969 65.16 1970 65.5 1971 65.63 1972 65.75 1973 65.84 1974 65.94 1975 66.01 1976 66.07 1977 66.09 1978 66.08 1979 66.02 1980 65.98 1981 65.96 1982 66.03 1983 66.19 1984 66.51 1985 66.83 1986 67.14 1987 67.42 1988 67.61 1989 67.77 1990 67.91 1991 68.06 1992 68.17 1993 68.23 1994 68.31 1995 68.4 1996 68.48 1997 68.62 1998 68.7 1999 68.69 2000 68.75 2001 68.89 2002 69 2003 69.1 2004 69.24 2005 69.46 2006 69.64 2007 69.68 2008 69.71 2009 67.99 2010 69.86 2011 69.95 2012 70.04 2013 70.11 2014 70.19 2015 70.29 2016 70.41 2017 70.56 2018 70.7