# year    value 
 1900 -3.576794 
 1901 -3.595225 
 1902 -3.632427 
 1903 -3.790502 
 1904 -3.715428 
 1905 -3.613775 
 1906 -3.598312 
 1907 -3.54904 
 1908 -3.577295 
 1909 -3.607816 
 1910 -3.591388 
 1911 -3.56484 
 1912 -3.443756 
 1913 -3.654396 
 1914 -3.578484 
 1915 -3.470715 
 1916  -3.4634 
 1917 -3.46714 
 1918 -3.369969 
 1919 -3.450747 
 1920 -3.388336 
 1921 -3.334172 
 1922 -3.42487 
 1923 -3.485348 
 1924 -3.409884 
 1925 -3.375458 
 1926  -3.4141 
 1927 -3.311287 
 1928 -3.241955 
 1929 -3.334531 
 1930 -3.50676 
 1931 -3.403251 
 1932 -3.370128 
 1933  -3.3933 
 1934 -3.485451 
 1935 -3.295561 
 1936 -3.332214 
 1937 -3.292414 
 1938 -3.264161 
 1939 -3.268112 
 1940 -3.286834 
 1941 -3.240775 
 1942 -3.272202 
 1943 -3.27635 
 1944 -3.326009 
 1945 -3.132914 
 1946 -3.265812 
 1947 -3.330189 
 1948 -3.235202 
 1949 -3.205631 
 1950 -3.359555 
 1951 -3.279629 
 1952 -3.407187 
 1953 -3.234845 
 1954 -3.304597 
 1955 -3.328223 
 1956 -3.265496 
 1957 -3.280513 
 1958 -3.262201 
 1959 -3.257048 
 1960 -3.209601 
 1961 -3.321335 
 1962 -3.364698 
 1963 -3.549308 
 1964 -3.565834 
 1965 -3.45011 
 1966 -3.358979 
 1967 -3.418504 
 1968 -3.447315 
 1969 -3.386135 
 1970 -3.386015 
 1971 -3.328797 
 1972 -3.223516 
 1973 -3.281028 
 1974 -3.283275 
 1975 -3.350134 
 1976 -3.133298 
 1977 -3.073724 
 1978 -3.130965 
 1979 -3.086791 
 1980 -2.993827 
 1981 -3.126102 
 1982 -3.133831 
 1983 -3.245837 
 1984 -3.129317 
 1985 -3.246679 
 1986 -3.139455 
 1987 -2.941875 
 1988 -2.971207 
 1989 -2.93725 
 1990 -2.827453 
 1991 -3.017678 
 1992 -3.267479 
 1993 -3.076548 
 1994 -3.110518 
 1995 -3.042099 
 1996 -2.719739 
 1997 -2.837423 
 1998 -2.621346 
 1999 -2.664136 
 2000 -2.737535 
 2001 -2.61144 
 2002 -2.500354 
 2003 -2.680085 
 2004 -2.501088 
 2005 -2.527452