Year Years
1800 26
1801 26
1802 26
1803 26
1804 26
1805 26
1806 26
1807 26
1808 26
1809 26
1810 26
1811 26
1812 26
1813 26
1814 26
1815 26
1816 26
1817 26
1818 26
1819 26
1820 26
1821 26
1822 26
1823 26
1824 26
1825 26
1826 26
1827 26
1828 26
1829 26
1830 26
1831 26
1832 26
1833 26
1834 26
1835 26
1836 26
1837 26
1838 26
1839 26
1840 26
1841 26
1842 26
1843 26
1844 26
1845 26
1846 26
1847 26
1848 26
1849 26
1850 26
1851 26
1852 26
1853 26
1854 26
1855 26
1856 26
1857 26
1858 26
1859 26
1860 26
1861 26
1862 26
1863 26
1864 26
1865 26
1866 26
1867 26
1868 26
1869 26
1870 26
1871 26.03
1872 26.07
1873 26.1
1874 26.13
1875 26.17
1876 26.2
1877 26.23
1878 26.27
1879 26.3
1880 26.34
1881 26.37
1882 26.4
1883 26.44
1884 26.47
1885 26.5
1886 26.54
1887 26.57
1888 26.6
1889 26.64
1890 26.67
1891 26.7
1892 26.74
1893 26.77
1894 26.8
1895 26.84
1896 26.87
1897 26.91
1898 26.94
1899 26.97
1900 27.01
1901 27.04
1902 27.07
1903 27.11
1904 26.62
1905 26.13
1906 25.64
1907 25.16
1908 24.66
1909 25
1910 25.34
1911 25.68
1912 26.03
1913 26.37
1914 26.93
1915 27.49
1916 28.05
1917 28.62
1918 18.08
1919 29.23
1920 29.81
1921 30.39
1922 30.97
1923 31.55
1924 32.46
1925 33.37
1926 34.29
1927 35.2
1928 36.12
1929 36.97
1930 37.84
1931 38.69
1932 39.56
1933 40.43
1934 41.59
1935 42.77
1936 43.95
1937 45.12
1938 46.3
1939 46.99
1940 47.68
1941 48.37
1942 49.06
1943 47.05
1944 46.01
1945 46.61
1946 49.41
1947 51.67
1948 52.38
1949 52.94
1950 39.71
1951 29.82
1952 27.64
1953 35.43
1954 47.59
1955 52.15
1956 53.88
1957 55.05
1958 55.78
1959 56.64
1960 57.26
1961 57.73
1962 58.26
1963 58.92
1964 59.81
1965 60.91
1966 62.22
1967 63.58
1968 64.91
1969 66.17
1970 67.36
1971 68.02
1972 68.59
1973 69.09
1974 69.5
1975 69.82
1976 70.09
1977 70.33
1978 70.51
1979 70.68
1980 70.82
1981 70.92
1982 71.02
1983 71.11
1984 71.19
1985 71.25
1986 71.32
1987 71.31
1988 71.46
1989 71.54
1990 71.62
1991 71.68
1992 71.72
1993 71.73
1994 71.62
1995 64.08
1996 64.04
1997 63.97
1998 63.86
1999 63.75
2000 63.63
2001 63.51
2002 63.42
2003 69.75
2004 69.74
2005 69.76
2006 69.81
2007 69.82
2008 69.96
2009 70.02
2010 70.1
2011 70.19
2012 70.29
2013 70.41
2014 70.52
2015 70.64
2016 70.74
2017 70.94
2018 71.13