# year    value 
 1900 -3.291185 
 1901 -3.363359 
 1902 -3.359071 
 1903 -3.635422 
 1904 -3.572875 
 1905 -3.426606 
 1906 -3.396792 
 1907 -3.354791 
 1908 -3.36726 
 1909 -3.326712 
 1910 -3.333059 
 1911 -3.256531 
 1912 -3.275702 
 1913 -3.348723 
 1914 -3.317131 
 1915 -3.239149 
 1916 -3.218974 
 1917 -3.254862 
 1918 -3.165912 
 1919 -3.266746 
 1920 -3.151286 
 1921 -3.156679 
 1922 -3.159453 
 1923 -3.230166 
 1924 -3.173252 
 1925 -3.157513 
 1926 -3.200875 
 1927 -3.116649 
 1928 -3.109121 
 1929 -3.136558 
 1930 -3.238312 
 1931 -3.200339 
 1932 -3.149681 
 1933 -3.203044 
 1934 -3.291616 
 1935 -3.098579 
 1936 -3.050349 
 1937 -3.101892 
 1938 -3.015664 
 1939 -3.077176 
 1940 -3.142889 
 1941 -3.06854 
 1942 -3.051278 
 1943 -3.010471 
 1944 -3.048242 
 1945 -3.084613 
 1946 -3.121213 
 1947 -3.102463 
 1948 -3.03709 
 1949 -2.958778 
 1950 -3.102925 
 1951 -3.066425 
 1952 -3.086533 
 1953 -3.072649 
 1954 -3.048024 
 1955 -3.112278 
 1956 -3.013475 
 1957 -3.061567 
 1958 -3.039307 
 1959 -2.994136 
 1960 -2.966269 
 1961 -3.031661 
 1962 -3.070899 
 1963 -3.267255 
 1964 -3.462514 
 1965 -3.276262 
 1966 -3.193223 
 1967 -3.196825 
 1968 -3.179186 
 1969 -3.149024 
 1970 -3.123963 
 1971 -3.038728 
 1972 -3.038365 
 1973 -3.023154 
 1974 -3.037037 
 1975 -3.068732 
 1976 -2.958866 
 1977 -2.934145 
 1978 -2.895082 
 1979 -2.874044 
 1980 -2.762021 
 1981 -2.816284 
 1982 -2.905883 
 1983 -3.066792 
 1984 -2.879522 
 1985 -2.965275 
 1986 -2.852378 
 1987 -2.726537 
 1988 -2.677854 
 1989 -2.700484 
 1990 -2.574704 
 1991 -2.775652 
 1992 -3.006202 
 1993 -2.858042 
 1994 -2.873199 
 1995 -2.772543 
 1996 -2.55782 
 1997 -2.563519 
 1998 -2.450255 
 1999 -2.477995 
 2000 -2.494331 
 2001 -2.350876 
 2002 -2.297708 
 2003 -2.386277 
 2004 -2.29654 
 2005 -2.270767