# year    value 
 1900 -0.7396767 
 1901 -0.915554 
 1902 -0.8911011 
 1903 -1.095837 
 1904 -1.071227 
 1905 -0.9218996 
 1906 -0.8749044 
 1907 -0.7745021 
 1908 -0.8010731 
 1909 -0.7220837 
 1910 -0.7715517 
 1911 -0.7657032 
 1912 -0.6994085 
 1913 -0.8125964 
 1914 -0.677889 
 1915 -0.7175539 
 1916 -0.6861817 
 1917 -0.6487995 
 1918 -0.6983247 
 1919 -0.7188098 
 1920 -0.6641121 
 1921 -0.6115532 
 1922 -0.6593758 
 1923 -0.6461481 
 1924 -0.678189 
 1925 -0.637564 
 1926 -0.6335837 
 1927 -0.5665662 
 1928 -0.6228879 
 1929 -0.6423587 
 1930 -0.6428215 
 1931 -0.6660717 
 1932 -0.5666096 
 1933 -0.6259525 
 1934 -0.7135634 
 1935 -0.5635302 
 1936 -0.5035779 
 1937 -0.5800698 
 1938 -0.5714912 
 1939 -0.4904846 
 1940 -0.6208866 
 1941 -0.5930352 
 1942 -0.5088946 
 1943 -0.5456033 
 1944 -0.5267766 
 1945 -0.4660647 
 1946 -0.5755969 
 1947 -0.5777534 
 1948 -0.5340676 
 1949 -0.395926 
 1950 -0.5140792 
 1951 -0.4707265 
 1952 -0.4898752 
 1953 -0.5862511 
 1954 -0.4618473 
 1955 -0.5212243 
 1956 -0.5002216 
 1957 -0.5079158 
 1958 -0.570758 
 1959 -0.5291459 
 1960 -0.5422463 
 1961 -0.4441672 
 1962 -0.5610591 
 1963 -0.5263563 
 1964 -0.8109434 
 1965 -0.7343924 
 1966 -0.7053438 
 1967 -0.6425204 
 1968 -0.5927235 
 1969 -0.6791078 
 1970 -0.5728989 
 1971 -0.4604489 
 1972 -0.4321386 
 1973 -0.4050437 
 1974 -0.5104584 
 1975 -0.4345433 
 1976 -0.4180496 
 1977 -0.4578179 
 1978 -0.4232077 
 1979 -0.4185602 
 1980 -0.2270036 
 1981 -0.2308097 
 1982 -0.3546114 
 1983 -0.5537022 
 1984 -0.3441228 
 1985 -0.442225 
 1986 -0.3211823 
 1987 -0.2038015 
 1988 -0.1706285 
 1989 -0.1900393 
 1990 -0.1306934 
 1991 -0.1372145 
 1992 -0.4943739 
 1993 -0.3537019 
 1994 -0.3449533 
 1995 -0.3562222 
 1996 -0.1132796 
 1997 -0.07602294 
 1998 -0.07608432 
 1999 0.04032629 
 2000 -0.01052193 
 2001 0.1257947 
 2002 0.2237783 
 2003 0.05695435 
 2004 0.004822018 
 2005 0.1359182