# year    value 
 1900 -0.6330205 
 1901 -0.6881337 
 1902 -0.6928352 
 1903 -0.9570001 
 1904 -0.8812637 
 1905 -0.7827774 
 1906 -0.7321351 
 1907 -0.7046067 
 1908 -0.6891551 
 1909 -0.6793147 
 1910 -0.6532631 
 1911 -0.6171826 
 1912 -0.6140621 
 1913 -0.724629 
 1914 -0.6746301 
 1915 -0.6355948 
 1916 -0.5582877 
 1917 -0.5819331 
 1918 -0.59687 
 1919 -0.5737971 
 1920 -0.5379183 
 1921 -0.5489473 
 1922 -0.5217987 
 1923 -0.5128682 
 1924 -0.5190706 
 1925 -0.5031526 
 1926 -0.5129238 
 1927 -0.484425 
 1928 -0.5098838 
 1929 -0.5298799 
 1930 -0.5465136 
 1931 -0.5142405 
 1932 -0.5113819 
 1933 -0.5384621 
 1934 -0.5742835 
 1935 -0.4816181 
 1936 -0.4245693 
 1937 -0.4560498 
 1938 -0.4333761 
 1939 -0.4411696 
 1940 -0.5012072 
 1941 -0.4832726 
 1942 -0.4387992 
 1943 -0.4079446 
 1944 -0.3853465 
 1945 -0.4415235 
 1946 -0.4508936 
 1947 -0.4327239 
 1948 -0.3896451 
 1949 -0.393141 
 1950 -0.404788 
 1951 -0.4288834 
 1952 -0.4231249 
 1953 -0.4114277 
 1954 -0.4226219 
 1955 -0.4271349 
 1956 -0.4077025 
 1957 -0.4172928 
 1958 -0.3923697 
 1959 -0.3915584 
 1960 -0.3894008 
 1961 -0.4217923 
 1962 -0.430857 
 1963 -0.5301753 
 1964 -0.6728062 
 1965 -0.6159068 
 1966 -0.5824358 
 1967 -0.5466961 
 1968 -0.554983 
 1969 -0.555652 
 1970 -0.5026105 
 1971 -0.4034672 
 1972 -0.3880007 
 1973 -0.3581372 
 1974 -0.4028178 
 1975 -0.3946904 
 1976 -0.3475132 
 1977 -0.3623679 
 1978 -0.3184031 
 1979 -0.2803662 
 1980 -0.1944333 
 1981 -0.1772186 
 1982 -0.3370103 
 1983 -0.4316775 
 1984 -0.3097291 
 1985 -0.2690662 
 1986 -0.2494248 
 1987 -0.1729936 
 1988 -0.09126609 
 1989 -0.06482648 
 1990 -0.02663564 
 1991 -0.1299759 
 1992 -0.4179983 
 1993 -0.2619313 
 1994 -0.2050479 
 1995 -0.1193371 
 1996 -0.015659 
 1997 0.05533013 
 1998 0.09016552 
 1999 0.1250977 
 2000 0.1464488 
 2001 0.2322673 
 2002 0.2766429 
 2003 0.2452436 
 2004 0.2543302 
 2005 0.7225893