# year    value 
 1900 -0.5823951 
 1901 -0.6599368 
 1902 -0.6240729 
 1903 -0.942163 
 1904 -0.8550848 
 1905 -0.7024741 
 1906 -0.6846839 
 1907 -0.5978619 
 1908 -0.6479396 
 1909 -0.556698 
 1910 -0.6082755 
 1911 -0.5148831 
 1912 -0.5673498 
 1913 -0.62011 
 1914 -0.5678633 
 1915 -0.5375125 
 1916 -0.5060337 
 1917 -0.4677596 
 1918 -0.5379069 
 1919 -0.5248198 
 1920 -0.477216 
 1921 -0.4466164 
 1922 -0.4844326 
 1923 -0.4566939 
 1924 -0.4858039 
 1925 -0.4251568 
 1926 -0.478671 
 1927 -0.3474912 
 1928 -0.4537264 
 1929 -0.4606732 
 1930 -0.4707533 
 1931 -0.4682704 
 1932 -0.43676 
 1933 -0.4540505 
 1934 -0.5656744 
 1935 -0.413413 
 1936 -0.3348356 
 1937 -0.4099214 
 1938 -0.3269451 
 1939 -0.3245797 
 1940 -0.4172485 
 1941 -0.3959412 
 1942 -0.3078878 
 1943 -0.3203487 
 1944 -0.3212586 
 1945 -0.3300025 
 1946 -0.4389671 
 1947 -0.3483692 
 1948 -0.3460123 
 1949 -0.2205105 
 1950 -0.3558017 
 1951 -0.3016263 
 1952 -0.3249324 
 1953 -0.401282 
 1954 -0.2990088 
 1955 -0.3671758 
 1956 -0.2903596 
 1957 -0.3050313 
 1958 -0.338113 
 1959 -0.3213741 
 1960 -0.2741886 
 1961 -0.2376153 
 1962 -0.2838283 
 1963 -0.3681494 
 1964 -0.6942098 
 1965 -0.5442443 
 1966 -0.5070693 
 1967 -0.4611322 
 1968 -0.406386 
 1969 -0.4237722 
 1970 -0.376413 
 1971 -0.2747341 
 1972 -0.2905855 
 1973 -0.2325749 
 1974 -0.2934522 
 1975 -0.274334 
 1976 -0.2321571 
 1977 -0.2834553 
 1978 -0.213976 
 1979 -0.2024087 
 1980 -0.08233307 
 1981 -0.02145688 
 1982 -0.1078969 
 1983 -0.3089736 
 1984 -0.1398673 
 1985 -0.157628 
 1986 -0.1400231 
 1987 -0.02842666 
 1988 0.07883783 
 1989 0.02558749 
 1990 0.09933239 
 1991 0.05493449 
 1992 -0.3175909 
 1993 -0.1219097 
 1994 -0.1082841 
 1995 -0.06630845 
 1996 0.09106568 
 1997 0.1588254 
 1998 0.1830571 
 1999 0.2268969 
 2000 0.2170073 
 2001 0.3221558 
 2002 0.4373283 
 2003 0.3343599 
 2004 0.3225723 
 2005 0.4425046