# year    value 
 1900 -0.6382058 
 1901 -0.6124964 
 1902 -0.7437575 
 1903 -1.076714 
 1904 -0.8852427 
 1905 -0.7908453 
 1906 -0.7100292 
 1907 -0.707155 
 1908 -0.7373375 
 1909 -0.6915118 
 1910 -0.6522646 
 1911 -0.5779843 
 1912 -0.6942637 
 1913 -0.8779844 
 1914 -0.6808603 
 1915 -0.6099653 
 1916 -0.5116592 
 1917 -0.5763216 
 1918 -0.5921619 
 1919 -0.5489026 
 1920 -0.5404052 
 1921 -0.5735606 
 1922 -0.4605145 
 1923 -0.5148737 
 1924 -0.4489884 
 1925 -0.4960288 
 1926 -0.4519492 
 1927 -0.5033971 
 1928 -0.4744708 
 1929 -0.5853111 
 1930 -0.5221299 
 1931 -0.5302969 
 1932 -0.5481654 
 1933 -0.5354985 
 1934 -0.4685252 
 1935 -0.4731741 
 1936 -0.4531943 
 1937 -0.4742209 
 1938 -0.464068 
 1939 -0.4369205 
 1940 -0.5118707 
 1941 -0.459116 
 1942 -0.4684859 
 1943 -0.4407836 
 1944 -0.3578785 
 1945 -0.4231857 
 1946 -0.4654091 
 1947 -0.3860184 
 1948 -0.4020218 
 1949 -0.4291022 
 1950 -0.3932858 
 1951 -0.4791276 
 1952 -0.5316546 
 1953 -0.4421366 
 1954 -0.4439325 
 1955 -0.3805797 
 1956 -0.456202 
 1957 -0.4352667 
 1958 -0.4831893 
 1959 -0.4282868 
 1960 -0.4626651 
 1961 -0.4784124 
 1962 -0.4028413 
 1963 -0.5520398 
 1964 -0.7259936 
 1965 -0.6611314 
 1966 -0.5953106 
 1967 -0.6683947 
 1968 -0.6986143 
 1969 -0.6900647 
 1970 -0.528024 
 1971 -0.4523162 
 1972 -0.457882 
 1973 -0.4338092 
 1974 -0.391206 
 1975 -0.474364 
 1976 -0.4512127 
 1977 -0.3511493 
 1978 -0.340416 
 1979 -0.3174979 
 1980 -0.2708663 
 1981 -0.167845 
 1982 -0.3088553 
 1983 -0.5555845 
 1984 -0.3343108 
 1985 -0.3231105 
 1986 -0.2692887 
 1987 -0.2175175 
 1988 -0.1280065 
 1989 -0.05774483 
 1990 -0.04145636 
 1991 -0.07534849 
 1992 -0.5548043 
 1993 -0.3627283 
 1994 -0.233469 
 1995 -0.1022918 
 1996 0.03438121 
 1997 0.0322498 
 1998 0.08769875 
 1999 0.1143368 
 2000 0.2173417 
 2001 0.2516907 
 2002 0.2823705 
 2003 0.3261298 
 2004 0.3332354 
 2005 1.351174