Year Years
1800 32.65
1801 32.65
1802 32.65
1803 32.65
1804 32.65
1805 32.65
1806 32.65
1807 32.65
1808 32.65
1809 32.65
1810 32.65
1811 32.65
1812 32.65
1813 32.65
1814 32.65
1815 32.65
1816 32.65
1817 32.65
1818 32.65
1819 32.65
1820 32.65
1821 32.65
1822 32.65
1823 32.65
1824 32.65
1825 32.65
1826 32.65
1827 32.65
1828 32.65
1829 32.65
1830 32.65
1831 32.65
1832 32.65
1833 32.65
1834 32.65
1835 32.65
1836 32.65
1837 32.65
1838 32.65
1839 32.65
1840 32.65
1841 32.65
1842 32.65
1843 32.65
1844 32.65
1845 32.65
1846 32.65
1847 32.65
1848 32.65
1849 32.65
1850 32.65
1851 32.65
1852 32.65
1853 32.65
1854 32.65
1855 32.65
1856 32.65
1857 32.65
1858 32.65
1859 32.65
1860 32.65
1861 32.65
1862 32.65
1863 32.65
1864 32.65
1865 32.65
1866 32.65
1867 32.65
1868 32.65
1869 32.65
1870 32.65
1871 32.61
1872 32.58
1873 32.54
1874 32.5
1875 32.46
1876 32.43
1877 32.39
1878 32.35
1879 32.32
1880 32.28
1881 32.24
1882 32.2
1883 32.17
1884 32.13
1885 32.09
1886 32.05
1887 32.02
1888 31.98
1889 31.94
1890 31.91
1891 31.87
1892 31.83
1893 31.79
1894 31.76
1895 31.72
1896 31.68
1897 31.65
1898 31.61
1899 31.57
1900 31.53
1901 31.5
1902 31.46
1903 31.42
1904 31.38
1905 31.35
1906 31.31
1907 31.27
1908 31.24
1909 31.2
1910 31.16
1911 31.12
1912 31.09
1913 31.05
1914 31.01
1915 30.98
1916 30.94
1917 30.9
1918 10.02
1919 30.83
1920 30.79
1921 30.75
1922 30.72
1923 30.68
1924 30.64
1925 30.6
1926 30.57
1927 30.53
1928 30.49
1929 30.45
1930 30.42
1931 30.38
1932 30.34
1933 30.31
1934 30.27
1935 30.23
1936 30.19
1937 30.16
1938 30.12
1939 30.08
1940 30.05
1941 30.01
1942 29.97
1943 29.93
1944 29.9
1945 29.86
1946 29.82
1947 29.78
1948 29.75
1949 29.71
1950 29.67
1951 29.7
1952 29.82
1953 29.97
1954 30.17
1955 30.4
1956 30.67
1957 30.99
1958 31.35
1959 31.76
1960 32.24
1961 32.78
1962 33.37
1963 34.03
1964 34.74
1965 35.48
1966 36.24
1967 37
1968 37.74
1969 38.44
1970 39.12
1971 40.25
1972 41.34
1973 42.3
1974 43.26
1975 44.26
1976 44.81
1977 45.36
1978 42.51
1979 46.98
1980 48.19
1981 49.43
1982 50.82
1983 52.21
1984 53.71
1985 55.34
1986 56.91
1987 58.42
1988 59.8
1989 61.13
1990 62.42
1991 63.64
1992 64.77
1993 65.89
1994 66.9
1995 67.85
1996 68.79
1997 69.77
1998 70.63
1999 71.33
2000 72.13
2001 72.81
2002 73.49
2003 74.27
2004 73.75
2005 75.71
2006 76.32
2007 77.09
2008 77.61
2009 77.82
2010 77.91
2011 78.27
2012 78.56
2013 78.75
2014 79.05
2015 79.29
2016 79.46
2017 79.77
2018 80.08