# year    value 
 1900 -0.5383382 
 1901 -0.1948765 
 1902 -0.6893833 
 1903 -0.7546244 
 1904 -0.6538369 
 1905 -0.5094411 
 1906 -0.1719226 
 1907 -0.2635757 
 1908 -0.3412551 
 1909 -0.5137857 
 1910 -0.4842509 
 1911 -0.4002374 
 1912 -0.653877 
 1913 -0.5814175 
 1914 -0.2854762 
 1915 -0.2879598 
 1916 -0.3223431 
 1917 -0.4873318 
 1918 -0.116688 
 1919 -0.2543555 
 1920 -0.5097969 
 1921 -0.2017678 
 1922 -0.3413375 
 1923 -0.34461 
 1924 -0.4745258 
 1925 -0.06121271 
 1926 -0.3694339 
 1927 -0.2983592 
 1928 -0.4060124 
 1929 -0.2299435 
 1930 -0.07711868 
 1931 -0.2604104 
 1932 -0.1683604 
 1933 -0.4009756 
 1934 -0.1292726 
 1935 -0.2369911 
 1936 -0.4746869 
 1937 -0.05087457 
 1938 -0.3859965 
 1939 -0.2228413 
 1940 -0.3219639 
 1941 -0.0393386 
 1942 -0.4947319 
 1943 -0.281923 
 1944 -0.04188464 
 1945 -0.4195724 
 1946 -0.2931008 
 1947 -0.1122593 
 1948 -0.3086878 
 1949 -0.1497914 
 1950 -0.3084505 
 1951 -0.1070491 
 1952 -0.09673315 
 1953 -0.1610256 
 1954 -0.07699419 
 1955 -0.347044 
 1956 -0.4060014 
 1957 -0.26603 
 1958 -0.4057917 
 1959 -0.3594599 
 1960 -0.2339442 
 1961 -0.4935003 
 1962 -0.3068078 
 1963 -0.386286 
 1964 -0.5100594 
 1965 -0.2231809 
 1966 -0.2917821 
 1967 -0.2745061 
 1968 -0.3558747 
 1969 -0.4041403 
 1970 -0.177698 
 1971 -0.3061771 
 1972 -0.07342336 
 1973 -0.4603727 
 1974 -0.4625582 
 1975 -0.2283647 
 1976 -0.2238697 
 1977 -0.1430605 
 1978 -0.1308601 
 1979 -0.1498127 
 1980 -0.1642773 
 1981 0.05450867 
 1982 0.0962173 
 1983 -0.5155108 
 1984 -0.2376185 
 1985 -0.1861802 
 1986 -0.1249151 
 1987 0.03077739 
 1988 0.2652558 
 1989 0.2045198 
 1990 0.08714643 
 1991 0.01195444 
 1992 -0.1938263 
 1993 -0.2851226 
 1994 0.1030216 
 1995 0.07259285 
 1996 0.2638041 
 1997 0.5576764 
 1998 0.3179732 
 1999 0.6508178 
 2000 0.5627586 
 2001 0.4641196 
 2002 0.7546254 
 2003 0.5712733 
 2004 0.4098142 
 2005 0.8047569