Year Years 1800 32.2 1801 32.2 1802 32.2 1803 32.2 1804 32.2 1805 32.2 1806 32.2 1807 32.2 1808 32.2 1809 32.2 1810 32.2 1811 32.2 1812 32.2 1813 32.2 1814 32.2 1815 32.2 1816 32.2 1817 32.2 1818 32.2 1819 32.2 1820 32.2 1821 32.2 1822 32.2 1823 32.2 1824 32.2 1825 32.2 1826 32.2 1827 32.2 1828 32.2 1829 32.2 1830 32.2 1831 32.2 1832 32.2 1833 32.2 1834 32.2 1835 32.2 1836 32.2 1837 32.2 1838 32.2 1839 32.2 1840 32.2 1841 32.2 1842 32.2 1843 32.2 1844 32.2 1845 32.2 1846 32.2 1847 32.2 1848 32.2 1849 32.2 1850 32.2 1851 32.2 1852 32.2 1853 32.2 1854 32.2 1855 32.2 1856 32.2 1857 32.2 1858 32.2 1859 32.2 1860 32.2 1861 32.2 1862 32.2 1863 32.2 1864 32.2 1865 32.2 1866 32.2 1867 32.2 1868 32.2 1869 32.2 1870 32.2 1871 32.24 1872 32.28 1873 32.31 1874 32.35 1875 32.39 1876 32.43 1877 32.47 1878 32.51 1879 32.54 1880 32.58 1881 32.62 1882 32.66 1883 32.7 1884 32.74 1885 32.77 1886 32.81 1887 32.85 1888 32.89 1889 32.93 1890 32.97 1891 33 1892 33.04 1893 33.08 1894 33.12 1895 33.16 1896 33.2 1897 33.23 1898 33.27 1899 33.31 1900 33.35 1901 33.39 1902 33.43 1903 33.46 1904 33.5 1905 33.54 1906 33.58 1907 33.62 1908 33.66 1909 33.69 1910 33.73 1911 33.77 1912 33.81 1913 33.85 1914 33.89 1915 33.92 1916 33.96 1917 34 1918 13.16 1919 34.08 1920 34.12 1921 34.15 1922 34.19 1923 34.23 1924 34.27 1925 34.31 1926 34.35 1927 34.38 1928 34.42 1929 34.46 1930 34.5 1931 34.54 1932 34.58 1933 34.61 1934 34.65 1935 34.69 1936 34.73 1937 34.77 1938 34.81 1939 34.84 1940 34.88 1941 34.92 1942 34.96 1943 35 1944 35.04 1945 35.07 1946 36.9 1947 38.73 1948 40.57 1949 42.4 1950 44.25 1951 44.55 1952 45.07 1953 45.57 1954 46.04 1955 46.49 1956 46.91 1957 47.3 1958 47.67 1959 48.03 1960 48.37 1961 48.7 1962 49.03 1963 49.38 1964 49.73 1965 50.11 1966 50.51 1967 50.92 1968 51.35 1969 51.8 1970 52.27 1971 52.67 1972 53.07 1973 53.46 1974 53.82 1975 54.21 1976 54.62 1977 54.97 1978 55.2 1979 55.59 1980 55.8 1981 55.98 1982 56.05 1983 56.3 1984 56.25 1985 56.38 1986 56.26 1987 56.02 1988 55.68 1989 55.26 1990 54.86 1991 54.6 1992 54.05 1993 53.73 1994 53.18 1995 52.9 1996 52.66 1997 52.5 1998 52.48 1999 52.54 2000 52.86 2001 53.36 2002 53.83 2003 54.31 2004 54.8 2005 55.3 2006 56.01 2007 56.98 2008 57.98 2009 58.58 2010 59.3 2011 59.94 2012 60.68 2013 61.75 2014 62.63 2015 63.49 2016 64.32 2017 64.94 2018 65.46