# year    value 
 1900 -0.6345729 
 1901 -0.7815953 
 1902 -0.731607 
 1903 -1.010398 
 1904 -0.9541044 
 1905 -0.8153554 
 1906 -0.7591742 
 1907 -0.6542289 
 1908 -0.6987036 
 1909 -0.6142322 
 1910 -0.6885259 
 1911 -0.6257101 
 1912 -0.5999569 
 1913 -0.699241 
 1914 -0.5726722 
 1915 -0.5874766 
 1916 -0.6066805 
 1917 -0.5035719 
 1918 -0.5935479 
 1919 -0.5558491 
 1920 -0.5472344 
 1921 -0.4940787 
 1922 -0.5251186 
 1923 -0.5326122 
 1924 -0.5805967 
 1925 -0.5166315 
 1926 -0.5282622 
 1927 -0.4268986 
 1928 -0.5304893 
 1929 -0.4885281 
 1930 -0.5142717 
 1931 -0.541436 
 1932 -0.496516 
 1933 -0.5295354 
 1934 -0.5886051 
 1935 -0.4348992 
 1936 -0.3777383 
 1937 -0.446383 
 1938 -0.4091341 
 1939 -0.3487926 
 1940 -0.4767818 
 1941 -0.4629496 
 1942 -0.3856457 
 1943 -0.393002 
 1944 -0.3837698 
 1945 -0.3525118 
 1946 -0.4571358 
 1947 -0.405398 
 1948 -0.3879614 
 1949 -0.2662784 
 1950 -0.3585435 
 1951 -0.356032 
 1952 -0.3895169 
 1953 -0.4391142 
 1954 -0.3315058 
 1955 -0.3976368 
 1956 -0.3708937 
 1957 -0.3587059 
 1958 -0.407629 
 1959 -0.3779143 
 1960 -0.3841579 
 1961 -0.2911479 
 1962 -0.4101813 
 1963 -0.40722 
 1964 -0.7252557 
 1965 -0.6214177 
 1966 -0.6171089 
 1967 -0.4937946 
 1968 -0.4361415 
 1969 -0.5333979 
 1970 -0.4404217 
 1971 -0.3047434 
 1972 -0.3004096 
 1973 -0.2246301 
 1974 -0.3686891 
 1975 -0.3060632 
 1976 -0.2956258 
 1977 -0.3774272 
 1978 -0.262855 
 1979 -0.2473441 
 1980 -0.1190442 
 1981 -0.04709689 
 1982 -0.1974354 
 1983 -0.4040072 
 1984 -0.1988706 
 1985 -0.2575255 
 1986 -0.1671403 
 1987 -0.04741287 
 1988 -0.001472125 
 1989 -0.0286274 
 1990 0.04538247 
 1991 0.03764344 
 1992 -0.3666695 
 1993 -0.1665171 
 1994 -0.1933627 
 1995 -0.1607717 
 1996 0.08540188 
 1997 0.1149331 
 1998 0.09279235 
 1999 0.2384646 
 2000 0.1929418 
 2001 0.2977404 
 2002 0.3844963 
 2003 0.2799813 
 2004 0.2606941 
 2005 0.3739419