Year Years 1800 31.3 1801 31.3 1802 31.3 1803 31.3 1804 31.3 1805 31.3 1806 31.3 1807 31.3 1808 31.3 1809 31.3 1810 31.3 1811 31.3 1812 31.3 1813 31.3 1814 31.3 1815 31.3 1816 31.3 1817 31.3 1818 31.3 1819 31.3 1820 31.3 1821 31.3 1822 31.3 1823 31.3 1824 31.3 1825 31.3 1826 31.3 1827 31.3 1828 31.3 1829 31.3 1830 31.3 1831 31.3 1832 31.3 1833 31.3 1834 31.3 1835 31.3 1836 31.3 1837 31.3 1838 31.3 1839 31.3 1840 31.3 1841 31.3 1842 31.3 1843 31.3 1844 31.3 1845 31.3 1846 31.3 1847 31.3 1848 31.3 1849 31.3 1850 31.3 1851 31.3 1852 31.3 1853 31.3 1854 31.3 1855 31.3 1856 31.3 1857 31.3 1858 31.3 1859 31.3 1860 31.3 1861 31.3 1862 31.3 1863 31.3 1864 31.3 1865 31.3 1866 31.3 1867 31.3 1868 31.3 1869 31.3 1870 31.3 1871 31.34 1872 31.37 1873 31.41 1874 31.44 1875 31.48 1876 31.51 1877 31.55 1878 31.58 1879 31.62 1880 31.66 1881 31.69 1882 31.73 1883 31.76 1884 31.8 1885 31.83 1886 31.87 1887 31.9 1888 31.94 1889 31.98 1890 32.01 1891 32.05 1892 32.08 1893 32.12 1894 32.15 1895 32.19 1896 32.22 1897 32.26 1898 32.3 1899 32.33 1900 32.37 1901 32.4 1902 32.44 1903 32.47 1904 32.51 1905 32.54 1906 32.58 1907 32.62 1908 32.65 1909 32.69 1910 32.72 1911 32.76 1912 32.79 1913 32.83 1914 32.86 1915 32.9 1916 32.94 1917 32.97 1918 12.76 1919 33.04 1920 33.08 1921 33.11 1922 33.15 1923 33.18 1924 33.22 1925 33.26 1926 33.29 1927 33.33 1928 33.36 1929 33.4 1930 33.43 1931 33.47 1932 33.5 1933 33.54 1934 33.58 1935 33.61 1936 33.65 1937 33.68 1938 33.72 1939 33.75 1940 33.79 1941 33.82 1942 33.86 1943 33.9 1944 33.93 1945 33.97 1946 34.58 1947 35.18 1948 35.79 1949 36.4 1950 37.01 1951 37.42 1952 38.22 1953 39.01 1954 39.8 1955 40.57 1956 41.35 1957 42.12 1958 42.89 1959 43.66 1960 44.42 1961 45.17 1962 45.93 1963 46.68 1964 47.43 1965 48.16 1966 48.91 1967 49.65 1968 50.39 1969 51.13 1970 51.86 1971 52.33 1972 52.8 1973 53.18 1974 53.67 1975 54 1976 54.31 1977 54.67 1978 55.09 1979 55.51 1980 55.9 1981 56.2 1982 56.4 1983 56.5 1984 56.43 1985 56.65 1986 56.86 1987 56.65 1988 57.14 1989 57.15 1990 57.39 1991 57.42 1992 57.51 1993 57.36 1994 57.16 1995 57.16 1996 56.94 1997 56.46 1998 56.21 1999 56.43 2000 56.32 2001 56.17 2002 56.23 2003 56.01 2004 56.39 2005 56.41 2006 56.99 2007 57.14 2008 57.39 2009 58.04 2010 58.74 2011 59.63 2012 60.35 2013 60.92 2014 61.47 2015 62.06 2016 62.59 2017 62.85 2018 63.09 2019 63.33 2020 63.57 2021 63.81 2022 64.05 2023 64.28 2024 64.51 2025 64.73 2026 64.94 2027 65.15 2028 65.35 2029 65.55 2030 65.74 2031 65.93 2032 66.11 2033 66.29 2034 66.47 2035 66.64 2036 66.81 2037 66.98 2038 67.14 2039 67.3 2040 67.46 2041 67.61 2042 67.76 2043 67.91 2044 68.05 2045 68.19 2046 68.33 2047 68.47 2048 68.61 2049 68.75 2050 68.89 2051 69.03 2052 69.17 2053 69.3 2054 69.43 2055 69.56 2056 69.69 2057 69.81 2058 69.93 2059 70.05 2060 70.17 2061 70.29 2062 70.41 2063 70.53 2064 70.65 2065 70.77 2066 70.89 2067 71.01 2068 71.13 2069 71.25 2070 71.37 2071 71.49 2072 71.61 2073 71.73 2074 71.84 2075 71.95 2076 72.06 2077 72.17 2078 72.28 2079 72.39 2080 72.5 2081 72.61 2082 72.72 2083 72.83 2084 72.94 2085 73.05 2086 73.16 2087 73.27 2088 73.38 2089 73.49 2090 73.6 2091 73.7 2092 73.8 2093 73.9 2094 74 2095 74.1 2096 74.2 2097 74.3 2098 74.4 2099 74.5 2100 74.6