# year    value 
 1900 -4.134816 
 1901 -4.142864 
 1902 -4.143214 
 1903 -4.405562 
 1904 -4.277329 
 1905 -4.196342 
 1906 -4.180239 
 1907 -4.150533 
 1908 -4.154574 
 1909 -4.136571 
 1910 -4.119239 
 1911 -4.025799 
 1912 -4.002089 
 1913 -4.177646 
 1914 -4.138322 
 1915 -4.00227 
 1916 -3.996996 
 1917 -3.995933 
 1918 -3.92584 
 1919 -4.020545 
 1920 -3.906917 
 1921 -3.899739 
 1922 -3.941326 
 1923 -4.041801 
 1924 -3.972715 
 1925 -3.893993 
 1926 -3.976021 
 1927 -3.874601 
 1928 -3.838732 
 1929 -3.904876 
 1930 -4.017926 
 1931 -3.972241 
 1932 -3.941935 
 1933 -3.953949 
 1934 -4.01769 
 1935 -3.817775 
 1936 -3.878169 
 1937 -3.875089 
 1938 -3.769314 
 1939 -3.80658 
 1940 -3.851791 
 1941 -3.781368 
 1942 -3.773967 
 1943 -3.782649 
 1944 -3.851862 
 1945 -3.741698 
 1946 -3.858808 
 1947 -3.897885 
 1948 -3.75609 
 1949 -3.730206 
 1950 -3.890326 
 1951 -3.841658 
 1952 -3.952736 
 1953 -3.776406 
 1954 -3.812374 
 1955 -3.902169 
 1956 -3.776493 
 1957 -3.850689 
 1958 -3.771306 
 1959 -3.740733 
 1960 -3.693646 
 1961 -3.819261 
 1962 -3.870739 
 1963 -4.035437 
 1964 -4.149354 
 1965 -3.981404 
 1966 -3.932715 
 1967 -3.941635 
 1968 -3.958498 
 1969 -3.91024 
 1970 -3.850657 
 1971 -3.808574 
 1972 -3.731354 
 1973 -3.746351 
 1974 -3.798017 
 1975 -3.868998 
 1976 -3.670121 
 1977 -3.596689 
 1978 -3.593473 
 1979 -3.60621 
 1980 -3.481755 
 1981 -3.598648 
 1982 -3.659343 
 1983 -3.80706 
 1984 -3.572078 
 1985 -3.742589 
 1986 -3.632931 
 1987 -3.446529 
 1988 -3.421575 
 1989 -3.427975 
 1990 -3.315288 
 1991 -3.501437 
 1992 -3.787894 
 1993 -3.596629 
 1994 -3.63441 
 1995 -3.500728 
 1996 -3.176714 
 1997 -3.290384 
 1998 -3.147228 
 1999 -3.118108 
 2000 -3.225266 
 2001 -3.040919 
 2002 -3.018034 
 2003 -3.148025 
 2004 -2.968413 
 2005 -2.939095