# year    value 
 1900 -0.5831037 
 1901 -0.6499398 
 1902 -0.6259379 
 1903 -0.9299509 
 1904 -0.7600242 
 1905 -0.7295036 
 1906 -0.6487391 
 1907 -0.6288111 
 1908 -0.6427811 
 1909 -0.6123472 
 1910 -0.5618302 
 1911 -0.5590367 
 1912 -0.6744352 
 1913 -0.6902766 
 1914 -0.6021348 
 1915 -0.5533292 
 1916 -0.5160223 
 1917 -0.4848119 
 1918 -0.5162777 
 1919 -0.4382471 
 1920 -0.4233288 
 1921 -0.5024667 
 1922 -0.421835 
 1923 -0.5141464 
 1924 -0.4592402 
 1925 -0.4645885 
 1926 -0.4051691 
 1927 -0.4237288 
 1928 -0.4762073 
 1929 -0.5009447 
 1930 -0.4721948 
 1931 -0.4223698 
 1932 -0.5027182 
 1933 -0.4809427 
 1934 -0.5294116 
 1935 -0.3385518 
 1936 -0.3960845 
 1937 -0.3719974 
 1938 -0.3889334 
 1939 -0.3474891 
 1940 -0.4763693 
 1941 -0.4523846 
 1942 -0.3879022 
 1943 -0.3603278 
 1944 -0.3608365 
 1945 -0.4539759 
 1946 -0.3827625 
 1947 -0.3262507 
 1948 -0.3312622 
 1949 -0.3417258 
 1950 -0.3863452 
 1951 -0.3706663 
 1952 -0.3958524 
 1953 -0.4196483 
 1954 -0.4323903 
 1955 -0.37721 
 1956 -0.3280678 
 1957 -0.3608489 
 1958 -0.3253965 
 1959 -0.3519093 
 1960 -0.3797426 
 1961 -0.3985255 
 1962 -0.4371901 
 1963 -0.6123033 
 1964 -0.6953932 
 1965 -0.5720267 
 1966 -0.5551651 
 1967 -0.5170761 
 1968 -0.5472248 
 1969 -0.546513 
 1970 -0.4636416 
 1971 -0.3405223 
 1972 -0.3790618 
 1973 -0.3634104 
 1974 -0.3821923 
 1975 -0.3419638 
 1976 -0.3758771 
 1977 -0.3522906 
 1978 -0.3556745 
 1979 -0.181274 
 1980 -0.1951868 
 1981 -0.159538 
 1982 -0.5129734 
 1983 -0.3754476 
 1984 -0.3054315 
 1985 -0.2640477 
 1986 -0.179903 
 1987 -0.1246947 
 1988 -0.1259961 
 1989 0.02275182 
 1990 -0.001632979 
 1991 -0.3154348 
 1992 -0.3656846 
 1993 -0.220961 
 1994 -0.1486589 
 1995 -0.1069178 
 1996 0.03273786 
 1997 0.06837668 
 1998 0.1215887 
 1999 0.1186756 
 2000 0.1854341 
 2001 0.305559 
 2002 0.2331128 
 2003 0.2651312 
 2004 0.2599628 
 2005 0.3747457