# year    value 
 1900 -3.096498 
 1901 -3.17033 
 1902 -3.204798 
 1903 -3.456026 
 1904 -3.362277 
 1905 -3.244247 
 1906 -3.213161 
 1907 -3.161337 
 1908 -3.160883 
 1909 -3.136564 
 1910 -3.137657 
 1911 -3.11619 
 1912 -3.082237 
 1913 -3.172498 
 1914 -3.153099 
 1915 -3.049042 
 1916 -3.05553 
 1917 -3.084396 
 1918 -3.033646 
 1919 -3.062628 
 1920 -3.003206 
 1921 -3.027195 
 1922 -2.995793 
 1923 -3.009867 
 1924 -3.025063 
 1925 -3.013277 
 1926 -3.013511 
 1927 -2.936296 
 1928 -2.923344 
 1929 -2.989454 
 1930 -3.037688 
 1931 -3.022317 
 1932 -2.983523 
 1933 -3.048846 
 1934 -3.103484 
 1935 -2.922483 
 1936 -2.867904 
 1937 -2.903521 
 1938 -2.888684 
 1939 -2.91132 
 1940 -2.949308 
 1941 -2.885988 
 1942 -2.888294 
 1943 -2.915917 
 1944 -2.883439 
 1945 -2.904443 
 1946 -2.944646 
 1947 -2.909917 
 1948 -2.871364 
 1949 -2.816627 
 1950 -2.930037 
 1951 -2.865323 
 1952 -2.870387 
 1953 -2.924606 
 1954 -2.90824 
 1955 -2.92537 
 1956 -2.886676 
 1957 -2.847723 
 1958 -2.914003 
 1959 -2.886979 
 1960 -2.846597 
 1961 -2.871805 
 1962 -2.91266 
 1963 -3.064281 
 1964 -3.249846 
 1965 -3.098898 
 1966 -2.973574 
 1967 -2.987413 
 1968 -3.017175 
 1969 -3.010564 
 1970 -3.001431 
 1971 -2.876532 
 1972 -2.89398 
 1973 -2.861567 
 1974 -2.867519 
 1975 -2.891432 
 1976 -2.804415 
 1977 -2.818259 
 1978 -2.786453 
 1979 -2.748752 
 1980 -2.645306 
 1981 -2.669582 
 1982 -2.785465 
 1983 -2.921614 
 1984 -2.797756 
 1985 -2.750369 
 1986 -2.717605 
 1987  -2.6774 
 1988 -2.548012 
 1989 -2.566268 
 1990 -2.471316 
 1991 -2.609782 
 1992 -2.903312 
 1993 -2.703497 
 1994 -2.68158 
 1995  -2.6574 
 1996 -2.484162 
 1997 -2.465926 
 1998 -2.351723 
 1999 -2.37268 
 2000 -2.374367 
 2001 -2.27082 
 2002 -2.182275 
 2003 -2.255714 
 2004 -2.26457 
 2005 -2.23737