# year    value 
 1900 -8.997264 
 1901 -8.431669 
 1902 -8.428303 
 1903 -8.842313 
 1904 -8.498488 
 1905 -8.493445 
 1906 -8.525735 
 1907 -8.290401 
 1908 -8.484601 
 1909 -8.638375 
 1910  -8.3252 
 1911 -8.920696 
 1912 -8.729392 
 1913 -8.591515 
 1914 -8.749722 
 1915 -8.669061 
 1916 -8.250557 
 1917 -8.45045 
 1918 -8.802485 
 1919 -8.394069 
 1920 -8.345599 
 1921 -8.276317 
 1922 -8.505527 
 1923 -8.875761 
 1924 -8.186063 
 1925 -8.271373 
 1926 -7.958512 
 1927 -8.644617 
 1928 -8.355844 
 1929 -8.310507 
 1930 -8.034513 
 1931 -8.560654 
 1932 -8.290689 
 1933 -8.595757 
 1934 -8.540419 
 1935 -8.790171 
 1936 -8.155901 
 1937 -8.796637 
 1938 -8.125211 
 1939 -8.376247 
 1940 -8.484992 
 1941 -8.119025 
 1942 -8.210309 
 1943 -8.496847 
 1944 -8.250331 
 1945 -8.400301 
 1946 -8.469272 
 1947 -8.33061 
 1948 -8.444279 
 1949 -8.148449 
 1950 -8.650666 
 1951 -8.513035 
 1952 -8.378091 
 1953 -8.117275 
 1954 -8.616919 
 1955 -7.710505 
 1956 -8.211579 
 1957 -8.241114 
 1958 -8.259789 
 1959 -8.337456 
 1960 -8.448106 
 1961 -8.010143 
 1962 -8.349755 
 1963 -8.25572 
 1964 -8.719819 
 1965 -8.532643 
 1966 -8.582841 
 1967 -8.78611 
 1968 -8.577985 
 1969 -8.530358 
 1970 -8.339521 
 1971 -8.382496 
 1972 -8.644244 
 1973 -8.160795 
 1974 -8.312296 
 1975 -8.055333 
 1976 -8.251001 
 1977 -8.031001 
 1978 -7.988343 
 1979 -8.034613 
 1980 -8.349456 
 1981 -8.063168 
 1982 -8.135506 
 1983 -8.208262 
 1984 -8.341755 
 1985 -8.342037 
 1986 -7.935805 
 1987 -8.125369 
 1988 -7.997877 
 1989 -7.80286 
 1990 -7.381405 
 1991 -7.825518 
 1992 -7.911507 
 1993 -8.045405 
 1994 -8.130207 
 1995 -7.779284 
 1996 -7.804271 
 1997 -7.884874 
 1998 -7.700711 
 1999 -7.802162 
 2000 -7.913877 
 2001 -7.356071 
 2002 -7.63075 
 2003 -7.131629 
 2004 -7.058561 
 2005 -7.558623