Year Years
1800 29.17
1801 29.17
1802 29.17
1803 29.17
1804 29.17
1805 29.17
1806 29.17
1807 29.17
1808 29.17
1809 29.17
1810 29.17
1811 29.17
1812 29.17
1813 29.17
1814 29.17
1815 29.17
1816 29.17
1817 29.17
1818 29.17
1819 29.17
1820 29.17
1821 29.17
1822 29.17
1823 29.17
1824 29.17
1825 29.17
1826 29.17
1827 29.17
1828 29.17
1829 29.17
1830 29.17
1831 29.17
1832 29.17
1833 29.17
1834 29.17
1835 29.17
1836 29.17
1837 29.17
1838 29.17
1839 29.17
1840 29.17
1841 29.17
1842 29.17
1843 29.17
1844 29.17
1845 29.17
1846 29.17
1847 29.17
1848 29.17
1849 29.17
1850 29.17
1851 29.17
1852 29.17
1853 29.17
1854 29.17
1855 29.17
1856 29.17
1857 29.17
1858 29.17
1859 29.17
1860 29.17
1861 29.17
1862 29.17
1863 29.17
1864 28.64
1865 28.12
1866 27.59
1867 27.07
1868 26.55
1869 26.59
1870 26.63
1871 26.66
1872 26.69
1873 26.72
1874 26.91
1875 27.09
1876 27.27
1877 27.46
1878 27.64
1879 27.82
1880 28
1881 28.19
1882 28.37
1883 28.55
1884 28.73
1885 28.91
1886 29.09
1887 29.27
1888 29.45
1889 29.63
1890 29.81
1891 29.99
1892 30.17
1893 30.35
1894 30.53
1895 30.71
1896 30.89
1897 31.07
1898 30.88
1899 30.7
1900 30.52
1901 30.75
1902 30.97
1903 31.2
1904 31.43
1905 31.65
1906 31.88
1907 32.1
1908 32.33
1909 32.55
1910 32.78
1911 35.64
1912 36.04
1913 33.9
1914 33.48
1915 33.07
1916 33.05
1917 30.11
1918 21.38
1919 31.08
1920 29.12
1921 32.01
1922 32.96
1923 33.95
1924 36.35
1925 35.45
1926 38.52
1927 37.85
1928 39.29
1929 38.07
1930 37.38
1931 35.67
1932 33.24
1933 26
1934 39.57
1935 41.04
1936 42.61
1937 41.64
1938 43.23
1939 45.51
1940 43.11
1941 29.03
1942 25.66
1943 23.73
1944 30.6
1945 40.14
1946 49.64
1947 41.97
1948 49.65
1949 52.29
1950 54.45
1951 54.6
1952 54.96
1953 55.32
1954 55.68
1955 56.03
1956 56.38
1957 56.73
1958 57.09
1959 57.44
1960 57.79
1961 58.15
1962 58.51
1963 58.87
1964 59.23
1965 59.59
1966 59.93
1967 60.29
1968 60.62
1969 60.93
1970 61.21
1971 61.91
1972 62.52
1973 63.19
1974 63.81
1975 64.35
1976 64.91
1977 65.2
1978 65.39
1979 65.47
1980 65.47
1981 65.46
1982 65.68
1983 65.79
1984 65.61
1985 65.9
1986 65.91
1987 65.97
1988 65.86
1989 66.25
1990 66.22
1991 65.92
1992 64.27
1993 64.41
1994 63.93
1995 64.89
1996 65.32
1997 65.64
1998 65.81
1999 66.11
2000 66.56
2001 67.21
2002 67.5
2003 67.33
2004 67.44
2005 67.64
2006 68
2007 68.35
2008 68.4
2009 68.8
2010 69.13
2011 69.94
2012 70.23
2013 71
2014 71.47
2015 71.79
2016 72.11
2017 72.2
2018 72.3