# year    value 
 1900 -0.5917989 
 1901 -0.5704975 
 1902 -0.6255251 
 1903 -1.091215 
 1904 -1.038272 
 1905 -0.7965939 
 1906 -0.7027177 
 1907 -0.6438338 
 1908 -0.5110699 
 1909 -0.648361 
 1910 -0.6474534 
 1911 -0.8779218 
 1912 -0.8808681 
 1913 -0.8356011 
 1914 -0.7057903 
 1915 -0.6820224 
 1916 -0.7615182 
 1917 -0.49694 
 1918 -0.4377605 
 1919 -0.5304375 
 1920 -0.6567483 
 1921 -0.5241263 
 1922 -0.4214337 
 1923 -0.5590288 
 1924 -0.7206668 
 1925 -0.4775844 
 1926 -0.4609994 
 1927 -0.4662693 
 1928 -0.5226803 
 1929 -0.5613198 
 1930 -0.5265767 
 1931 -0.5313538 
 1932 -0.4401591 
 1933 -0.5865943 
 1934 -0.5520096 
 1935 -0.4900445 
 1936 -0.5161359 
 1937 -0.4791266 
 1938 -0.4631181 
 1939 -0.4313631 
 1940 -0.4360697 
 1941 -0.3994199 
 1942 -0.4744682 
 1943 -0.5043545 
 1944 -0.4247899 
 1945 -0.4277709 
 1946 -0.5110104 
 1947 -0.4507782 
 1948 -0.5775934 
 1949 -0.351569 
 1950 -0.3108722 
 1951 -0.2999176 
 1952 -0.3598494 
 1953 -0.3228486 
 1954 -0.4862107 
 1955 -0.4875462 
 1956 -0.5349629 
 1957 -0.5157523 
 1958 -0.4795036 
 1959 -0.5234698 
 1960 -0.4412663 
 1961 -0.3807352 
 1962 -0.4831774 
 1963 -0.4902666 
 1964 -0.7526462 
 1965 -0.7374886 
 1966 -0.672047 
 1967 -0.530482 
 1968 -0.6043387 
 1969 -0.7734485 
 1970 -0.6331424 
 1971 -0.4581751 
 1972 -0.470833 
 1973 -0.5309341 
 1974 -0.535968 
 1975 -0.5447855 
 1976 -0.4836896 
 1977 -0.4613041 
 1978 -0.3885328 
 1979 -0.1938164 
 1980 -0.3260167 
 1981 -0.2094216 
 1982 -0.4604367 
 1983 -0.686646 
 1984 -0.4454139 
 1985 -0.4389254 
 1986 -0.2212953 
 1987 -0.2791216 
 1988 -0.2348755 
 1989 -0.09603365 
 1990 -0.2101509 
 1991 -0.04664167 
 1992 -0.6564461 
 1993 -0.4783429 
 1994 0.01214596 
 1995 -0.1323392 
 1996 -0.0690964 
 1997 0.1448651 
 1998 0.237197 
 1999 0.06928998 
 2000 0.4037232 
 2001 0.1315369 
 2002 0.2720222 
 2003 0.3947392 
 2004 0.3791994 
 2005 1.328684