Year Years 1800 25.2 1801 25.2 1802 25.2 1803 25.2 1804 25.2 1805 25.2 1806 25.2 1807 25.2 1808 25.2 1809 25.2 1810 25.2 1811 25.2 1812 25.2 1813 25.2 1814 25.2 1815 25.2 1816 25.2 1817 25.2 1818 25.2 1819 25.2 1820 25.2 1821 25.2 1822 25.2 1823 25.2 1824 25.2 1825 25.2 1826 25.2 1827 25.2 1828 25.2 1829 25.2 1830 25.2 1831 25.2 1832 25.2 1833 25.2 1834 25.2 1835 25.2 1836 25.2 1837 25.2 1838 25.2 1839 25.2 1840 25.2 1841 25.2 1842 25.2 1843 25.2 1844 25.2 1845 25.2 1846 25.2 1847 25.2 1848 25.2 1849 25.2 1850 25.2 1851 25.2 1852 25.2 1853 25.2 1854 25.2 1855 25.2 1856 25.2 1857 25.2 1858 25.2 1859 25.2 1860 25.2 1861 25.2 1862 25.2 1863 25.2 1864 25.2 1865 25.2 1866 25.2 1867 25.2 1868 25.2 1869 25.2 1870 25.2 1871 25.25 1872 25.31 1873 25.36 1874 25.41 1875 25.47 1876 25.52 1877 25.57 1878 25.63 1879 25.68 1880 25.74 1881 25.79 1882 25.84 1883 25.9 1884 25.95 1885 26 1886 26.06 1887 26.11 1888 26.16 1889 26.22 1890 26.27 1891 26.32 1892 26.38 1893 26.43 1894 26.48 1895 26.54 1896 26.59 1897 26.64 1898 26.7 1899 26.75 1900 26.81 1901 26.86 1902 26.91 1903 26.97 1904 27.02 1905 27.07 1906 27.13 1907 27.18 1908 27.23 1909 27.29 1910 27.34 1911 27.39 1912 27.45 1913 27.5 1914 27.55 1915 27.61 1916 27.66 1917 27.72 1918 13.11 1919 27.82 1920 27.88 1921 27.93 1922 27.98 1923 27.75 1924 27.51 1925 27.27 1926 27.03 1927 26.79 1928 27.12 1929 27.46 1930 27.79 1931 28.13 1932 28.46 1933 28.8 1934 29.14 1935 29.48 1936 29.82 1937 30.16 1938 30.56 1939 30.96 1940 31.36 1941 31.76 1942 32.17 1943 32.57 1944 32.98 1945 33.39 1946 34.77 1947 36.16 1948 37.56 1949 38.97 1950 40.37 1951 40.74 1952 41.39 1953 42.02 1954 42.62 1955 43.21 1956 43.76 1957 44.27 1958 44.76 1959 45.18 1960 45.53 1961 45.8 1962 45.97 1963 46.08 1964 46.13 1965 46.16 1966 46.22 1967 46.33 1968 46.59 1969 46.98 1970 47.56 1971 47.8 1972 48.15 1973 48.47 1974 48.86 1975 49.34 1976 49.92 1977 50.48 1978 51.06 1979 51.79 1980 52.35 1981 52.8 1982 53.46 1983 54.41 1984 55.26 1985 55.51 1986 55.92 1987 56.35 1988 56.82 1989 57.18 1990 57.55 1991 57.87 1992 57.94 1993 58.13 1994 58.13 1995 58.36 1996 58.56 1997 58.8 1998 58.97 1999 59.09 2000 59.64 2001 59.99 2002 60.2 2003 60.96 2004 61.36 2005 61.71 2006 62.14 2007 62.66 2008 63.17 2009 63.61 2010 64.01 2011 64.41 2012 64.78 2013 65.14 2014 65.52 2015 65.87 2016 66.21 2017 66.54 2018 66.85