# year    value 
 1900 -0.8761113 
 1901 -0.9572511 
 1902 -0.9608271 
 1903  -1.2304 
 1904 -1.212303 
 1905 -1.062751 
 1906 -1.044452 
 1907 -1.031235 
 1908 -0.9583806 
 1909 -0.9852973 
 1910 -0.979337 
 1911 -0.949975 
 1912 -0.9172032 
 1913 -1.060039 
 1914 -1.024706 
 1915 -0.9542997 
 1916 -0.8619983 
 1917 -0.8470252 
 1918 -0.8804428 
 1919 -0.8901437 
 1920 -0.8302211 
 1921 -0.7945052 
 1922 -0.8265681 
 1923 -0.8048689 
 1924 -0.8112923 
 1925 -0.8193129 
 1926 -0.792605 
 1927 -0.7968638 
 1928 -0.7241662 
 1929 -0.8242432 
 1930 -0.8423007 
 1931 -0.8082379 
 1932 -0.7752573 
 1933 -0.8463445 
 1934 -0.8363626 
 1935 -0.8095732 
 1936 -0.7363189 
 1937 -0.6961746 
 1938 -0.748211 
 1939 -0.7037121 
 1940 -0.7244024 
 1941 -0.7149974 
 1942 -0.7181447 
 1943 -0.7906125 
 1944 -0.7076262 
 1945 -0.7037305 
 1946 -0.7603143 
 1947 -0.7336692 
 1948 -0.6580421 
 1949 -0.6514699 
 1950 -0.6449972 
 1951 -0.666003 
 1952 -0.6921948 
 1953 -0.6922691 
 1954 -0.6786053 
 1955 -0.6849211 
 1956 -0.6822038 
 1957 -0.6464536 
 1958 -0.6875499 
 1959 -0.7133033 
 1960 -0.6204244 
 1961 -0.6678208 
 1962 -0.6977671 
 1963 -0.7707424 
 1964 -0.9005682 
 1965 -0.8478326 
 1966 -0.8603916 
 1967 -0.8173258 
 1968 -0.7931353 
 1969 -0.8447308 
 1970 -0.8025133 
 1971 -0.7000582 
 1972 -0.6382782 
 1973 -0.6559424 
 1974 -0.6736241 
 1975 -0.6743237 
 1976 -0.6102711 
 1977 -0.6153979 
 1978 -0.5434064 
 1979 -0.5400131 
 1980 -0.4461834 
 1981 -0.3904183 
 1982 -0.4843119 
 1983 -0.7192464 
 1984 -0.5373617 
 1985 -0.5407469 
 1986 -0.5388086 
 1987 -0.4267946 
 1988 -0.3352077 
 1989 -0.2922201 
 1990 -0.2151106 
 1991 -0.2251587 
 1992 -0.6152205 
 1993 -0.4733714 
 1994 -0.3818252 
 1995 -0.368582 
 1996 -0.2636664 
 1997 -0.1588507 
 1998 -0.1119148 
 1999 -0.07532788 
 2000 -0.03848349 
 2001 0.06550622 
 2002 0.07502759 
 2003 0.0519779 
 2004 0.07230893 
 2005 0.1680681