# year    value 
 1900 -0.733699 
 1901 -0.5762429 
 1902 -0.8035299 
 1903 -0.9898271 
 1904 -0.9027265 
 1905 -0.7109854 
 1906 -0.6200375 
 1907 -0.6080631 
 1908 -0.7518026 
 1909 -0.7701161 
 1910 -0.6962957 
 1911 -0.8027358 
 1912 -0.8849136 
 1913 -0.8879347 
 1914 -0.8658845 
 1915  -0.6297 
 1916 -0.5920754 
 1917 -0.6775026 
 1918 -0.5627023 
 1919 -0.5974654 
 1920 -0.6667131 
 1921 -0.5685086 
 1922 -0.5947386 
 1923 -0.6855665 
 1924 -0.5241225 
 1925 -0.4638575 
 1926 -0.5719054 
 1927 -0.5582063 
 1928 -0.5892927 
 1929 -0.5011123 
 1930 -0.5321698 
 1931 -0.6656127 
 1932 -0.5847509 
 1933 -0.7135492 
 1934 -0.4938239 
 1935 -0.6424483 
 1936 -0.6420819 
 1937 -0.5479353 
 1938 -0.5320216 
 1939 -0.6145451 
 1940 -0.5759844 
 1941 -0.3524185 
 1942 -0.5986046 
 1943 -0.5565223 
 1944 -0.48377 
 1945 -0.6818191 
 1946 -0.5575291 
 1947 -0.6247432 
 1948 -0.5538209 
 1949 -0.3725766 
 1950 -0.5415328 
 1951 -0.4667205 
 1952 -0.5242116 
 1953 -0.4492864 
 1954 -0.5180295 
 1955 -0.4474495 
 1956 -0.545326 
 1957 -0.5245963 
 1958 -0.5547726 
 1959 -0.5793841 
 1960 -0.4617571 
 1961 -0.5751584 
 1962 -0.5894805 
 1963 -0.7510907 
 1964 -0.7980973 
 1965 -0.816685 
 1966 -0.7003883 
 1967 -0.7241126 
 1968 -0.6955514 
 1969 -0.7314479 
 1970 -0.5794236 
 1971 -0.7095596 
 1972 -0.5508671 
 1973 -0.6388345 
 1974 -0.5809943 
 1975 -0.5086176 
 1976 -0.5847353 
 1977 -0.4460887 
 1978 -0.3982332 
 1979 -0.3651933 
 1980 -0.484896 
 1981 -0.2494805 
 1982 -0.366661 
 1983 -0.6380036 
 1984 -0.5250296 
 1985 -0.4722028 
 1986 -0.3040594 
 1987 -0.2730776 
 1988 -0.1789066 
 1989 -0.0617845 
 1990 0.001205135 
 1991 -0.2853589 
 1992 -0.4067086 
 1993 -0.5017011 
 1994 -0.2335667 
 1995 -0.02928031 
 1996 -0.06165421 
 1997 0.06606668 
 1998 0.07241581 
 1999 0.1111211 
 2000 0.308713 
 2001 0.3614679 
 2002 0.2712667 
 2003 0.464251 
 2004 0.3377326 
 2005 0.948745