Year Years
1800 29.1
1801 29.1
1802 29.1
1803 29.1
1804 29.1
1805 29.1
1806 29.1
1807 29.1
1808 29.1
1809 29.1
1810 29.1
1811 29.1
1812 29.1
1813 29.1
1814 29.1
1815 29.1
1816 29.1
1817 29.1
1818 29.1
1819 29.1
1820 30.08
1821 31.06
1822 32.04
1823 33.02
1824 34
1825 34
1826 34
1827 34
1828 34
1829 34
1830 34
1831 34
1832 34
1833 34
1834 34
1835 34
1836 34
1837 34
1838 34
1839 34
1840 34
1841 34
1842 34
1843 34
1844 34
1845 34
1846 34
1847 34
1848 34
1849 34
1850 34
1851 34
1852 34
1853 34
1854 34
1855 34
1856 34
1857 34
1858 34
1859 34
1860 34
1861 34
1862 34
1863 34
1864 34
1865 34
1866 34
1867 34
1868 34
1869 34
1870 34
1871 34
1872 34.01
1873 34.01
1874 34.01
1875 34.01
1876 34.02
1877 34.02
1878 34.02
1879 34.03
1880 34.03
1881 34.03
1882 34.04
1883 34.04
1884 34.04
1885 34.04
1886 34.05
1887 34.05
1888 34.05
1889 34.06
1890 34.06
1891 34.06
1892 34.06
1893 34.07
1894 34.07
1895 34.07
1896 34.08
1897 34.08
1898 34.08
1899 34.09
1900 34.09
1901 34.09
1902 34.09
1903 34.1
1904 34.1
1905 34.1
1906 34.11
1907 34.11
1908 34.11
1909 34.11
1910 34.12
1911 34.12
1912 34.12
1913 34.13
1914 34.13
1915 34.13
1916 34.14
1917 34.14
1918 21.88
1919 34.14
1920 34.15
1921 34.96
1922 35.79
1923 36.61
1924 37.42
1925 38.24
1926 39.07
1927 39.89
1928 40.7
1929 41.53
1930 42.35
1931 43.17
1932 43.99
1933 44.81
1934 45.63
1935 46.45
1936 47.28
1937 48.1
1938 48.92
1939 49.75
1940 50.56
1941 49.3
1942 35.32
1943 37.03
1944 36.33
1945 35.13
1946 44.29
1947 53.35
1948 56.38
1949 57.79
1950 58.79
1951 59.28
1952 60.24
1953 61.15
1954 62.01
1955 62.81
1956 63.57
1957 64.26
1958 64.91
1959 65.48
1960 65.99
1961 66.41
1962 66.76
1963 67.03
1964 67.25
1965 67.43
1966 67.62
1967 67.81
1968 68.05
1969 68.34
1970 68.68
1971 68.94
1972 69.15
1973 69.45
1974 69.9
1975 70.39
1976 70.65
1977 70.95
1978 71.19
1979 71.36
1980 71.58
1981 71.82
1982 72.04
1983 72.31
1984 72.78
1985 73.21
1986 73.68
1987 74.05
1988 74.38
1989 74.8
1990 75.48
1991 76.11
1992 76.56
1993 76.94
1994 77.18
1995 77.4
1996 77.73
1997 78.19
1998 78.55
1999 78.94
2000 79.38
2001 79.81
2002 80.14
2003 80.36
2004 80.65
2005 80.93
2006 81.13
2007 81.59
2008 82.06
2009 82.39
2010 82.69
2011 82.91
2012 83.16
2013 83.24
2014 83.39
2015 83.58
2016 83.67
2017 83.85
2018 84.03