# year    value 
 1900 0.2804815 
 1901 0.1943354 
 1902 0.2372077 
 1903 0.04723493 
 1904 0.05785491 
 1905 0.1014156 
 1906 0.1864496 
 1907 0.2877398 
 1908 0.239162 
 1909 0.2982092 
 1910 0.3211091 
 1911 0.3313614 
 1912 0.3406714 
 1913 0.2638052 
 1914 0.3609607 
 1915 0.346274 
 1916 0.3446137 
 1917 0.402063 
 1918 0.3495654 
 1919 0.3088076 
 1920 0.3320322 
 1921 0.4070787 
 1922 0.3366831 
 1923 0.3608594 
 1924 0.3370224 
 1925  0.46707 
 1926 0.414987 
 1927 0.3928711 
 1928 0.3873992 
 1929 0.3371314 
 1930 0.4108579 
 1931 0.3809218 
 1932 0.3294279 
 1933 0.3942342 
 1934 0.4195394 
 1935 0.4242467 
 1936 0.4449979 
 1937 0.4137027 
 1938 0.4462567 
 1939 0.5100728 
 1940 0.4209645 
 1941 0.441153 
 1942 0.4132911 
 1943 0.4101121 
 1944 0.4761241 
 1945 0.4552822 
 1946 0.4976326 
 1947 0.4512778 
 1948 0.4751535 
 1949 0.557453 
 1950 0.5031188 
 1951 0.4193762 
 1952 0.4003014 
 1953 0.4725713 
 1954 0.5150136 
 1955 0.5290528 
 1956 0.4590472 
 1957 0.5313671 
 1958 0.5202768 
 1959 0.5126674 
 1960 0.472129 
 1961 0.5235418 
 1962 0.4541088 
 1963 0.4808571 
 1964 0.2479038 
 1965 0.3049789 
 1966 0.3907952 
 1967 0.4927516 
 1968 0.469063 
 1969 0.4483299 
 1970 0.5069017 
 1971 0.5651349 
 1972 0.5850031 
 1973 0.586402 
 1974 0.5483661 
 1975 0.5228723 
 1976 0.5460806 
 1977 0.5786607 
 1978 0.558808 
 1979 0.6621745 
 1980 0.6984277 
 1981 0.693154 
 1982 0.6169472 
 1983 0.5121537 
 1984 0.5876005 
 1985 0.6331621 
 1986 0.7163377 
 1987 0.7302893 
 1988 0.729848 
 1989 0.7751005 
 1990 0.7867036 
 1991 0.8527752 
 1992 0.5361905 
 1993 0.6166725 
 1994 0.6993369 
 1995 0.6751782 
 1996 0.7733841 
 1997 0.8502678 
 1998 0.888904 
 1999  0.90416 
 2000 0.8941085 
 2001 1.011286 
 2002 1.074946 
 2003 1.025341 
 2004 0.9409251 
 2005 1.086651