# year    value 
 1900 -2.447584 
 1901 -2.697095 
 1902 -2.56486 
 1903 -2.817087 
 1904 -2.745271 
 1905 -2.859904 
 1906 -3.184005 
 1907 -2.89117 
 1908 -2.705428 
 1909 -2.773019 
 1910 -2.792423 
 1911 -2.866463 
 1912 -2.696478 
 1913 -2.938786 
 1914 -2.745342 
 1915 -2.806008 
 1916 -2.566679 
 1917 -2.678931 
 1918 -2.678567 
 1919 -2.753954 
 1920 -2.294621 
 1921 -2.416906 
 1922 -2.614675 
 1923 -2.47034 
 1924 -2.552112 
 1925 -2.533836 
 1926 -2.48651 
 1927 -2.665676 
 1928 -2.182135 
 1929 -2.612495 
 1930 -2.358866 
 1931 -2.587327 
 1932 -2.604156 
 1933 -2.768928 
 1934 -2.360834 
 1935 -2.562703 
 1936 -2.50273 
 1937 -2.359922 
 1938 -2.322476 
 1939 -2.359915 
 1940 -2.229342 
 1941 -2.321314 
 1942 -2.487266 
 1943 -2.365908 
 1944 -2.449793 
 1945 -2.37173 
 1946 -2.403656 
 1947 -2.31412 
 1948 -2.309901 
 1949 -2.463897 
 1950 -2.310224 
 1951 -2.256555 
 1952 -2.344293 
 1953 -2.423853 
 1954 -2.165242 
 1955 -2.428919 
 1956 -2.297269 
 1957 -2.104513 
 1958 -2.333182 
 1959 -2.355806 
 1960 -2.119842 
 1961 -2.140187 
 1962 -2.455862 
 1963 -2.411561 
 1964 -2.391299 
 1965 -2.378214 
 1966 -2.408035 
 1967 -2.43083 
 1968 -2.144237 
 1969 -2.210105 
 1970 -2.223719 
 1971 -2.094145 
 1972 -2.133419 
 1973 -2.224026 
 1974 -2.123712 
 1975 -2.136889 
 1976 -2.189912 
 1977 -2.260344 
 1978 -2.151624 
 1979 -2.040073 
 1980 -1.926563 
 1981 -2.022842 
 1982 -2.181412 
 1983 -2.182104 
 1984 -1.982811 
 1985 -2.180091 
 1986 -2.019373 
 1987 -1.751047 
 1988 -1.915732 
 1989 -1.702112 
 1990 -1.563991 
 1991 -1.718851 
 1992 -1.768374 
 1993 -1.787867 
 1994 -1.903855 
 1995 -1.923283 
 1996 -1.777478 
 1997 -1.533845 
 1998  -1.3931 
 1999 -1.457247 
 2000 -1.202431 
 2001 -0.9417263 
 2002 -1.155559 
 2003 -1.219764 
 2004 -1.272394 
 2005 -0.8864163