# year    value 
 1900 -0.6302508 
 1901 -0.6272318 
 1902 -0.6720929 
 1903 -0.8757557 
 1904 -0.8080477 
 1905 -0.7612216 
 1906 -0.6791003 
 1907 -0.6546612 
 1908 -0.6211915 
 1909 -0.6084033 
 1910 -0.6048987 
 1911 -0.5740267 
 1912 -0.4884323 
 1913 -0.5807424 
 1914 -0.5781047 
 1915 -0.5794952 
 1916 -0.5162367 
 1917 -0.5137804 
 1918 -0.5242277 
 1919 -0.5307209 
 1920 -0.5104046 
 1921 -0.4995882 
 1922 -0.5310195 
 1923 -0.5431779 
 1924 -0.5523591 
 1925 -0.4732704 
 1926 -0.4953432 
 1927 -0.4901178 
 1928 -0.4466334 
 1929 -0.5165238 
 1930 -0.450846 
 1931 -0.5057089 
 1932 -0.5128317 
 1933 -0.506669 
 1934 -0.4463824 
 1935 -0.4378604 
 1936 -0.4560473 
 1937 -0.428962 
 1938 -0.4913604 
 1939 -0.3880304 
 1940 -0.4158307 
 1941 -0.4148673 
 1942 -0.3988783 
 1943 -0.4823154 
 1944 -0.3916112 
 1945 -0.3780814 
 1946 -0.4172882 
 1947 -0.3874593 
 1948 -0.3810074 
 1949 -0.3651484 
 1950 -0.382903 
 1951 -0.4247387 
 1952 -0.4408407 
 1953 -0.3836686 
 1954 -0.3906582 
 1955 -0.3940251 
 1956 -0.3829405 
 1957 -0.3708671 
 1958 -0.3732503 
 1959 -0.3280762 
 1960 -0.3727011 
 1961 -0.3452105 
 1962 -0.3962284 
 1963 -0.4485793 
 1964 -0.6294339 
 1965 -0.5110248 
 1966 -0.5112261 
 1967 -0.4271432 
 1968 -0.4029762 
 1969 -0.4336502 
 1970 -0.4050015 
 1971 -0.3089363 
 1972 -0.2575179 
 1973 -0.2888155 
 1974 -0.3173726 
 1975 -0.3311715 
 1976 -0.3514019 
 1977 -0.2282254 
 1978 -0.279792 
 1979 -0.1592867 
 1980 -0.1826773 
 1981 -0.1307039 
 1982 -0.2245335 
 1983 -0.3303723 
 1984 -0.2165764 
 1985 -0.1635664 
 1986 -0.2110096 
 1987 -0.1710151 
 1988 -0.08465114 
 1989 -0.02870012 
 1990 -0.02958902 
 1991 -0.07212226 
 1992 -0.2951371 
 1993 -0.1955327 
 1994 -0.1457232 
 1995 -0.07991126 
 1996 -0.03741666 
 1997 0.04550819 
 1998 0.0967144 
 1999 0.1069541 
 2000 0.09216728 
 2001 0.1923958 
 2002 0.2353736 
 2003 0.1974265 
 2004 0.1680212 
 2005 -0.1588946