# year    value 
 1900 -3.120292 
 1901 -3.193921 
 1902 -3.223653 
 1903 -3.477951 
 1904 -3.388016 
 1905 -3.266535 
 1906 -3.235604 
 1907 -3.184981 
 1908 -3.186106 
 1909 -3.159803 
 1910 -3.161539 
 1911 -3.133343 
 1912 -3.105882 
 1913 -3.194036 
 1914 -3.173147 
 1915 -3.072277 
 1916 -3.075506 
 1917 -3.10523 
 1918 -3.049812 
 1919 -3.087574 
 1920 -3.021304 
 1921 -3.04302 
 1922 -3.015795 
 1923 -3.036792 
 1924 -3.043174 
 1925 -3.030905 
 1926 -3.03641 
 1927 -2.958339 
 1928 -2.946049 
 1929 -3.007432 
 1930 -3.062207 
 1931 -3.044075 
 1932 -3.00383 
 1933 -3.067692 
 1934 -3.126477 
 1935 -2.944005 
 1936 -2.890202 
 1937 -2.927766 
 1938 -2.904203 
 1939 -2.93159 
 1940 -2.972967 
 1941 -2.908298 
 1942 -2.908213 
 1943 -2.927473 
 1944 -2.903581 
 1945 -2.926462 
 1946 -2.966225 
 1947 -2.933449 
 1948 -2.891618 
 1949   -2.834 
 1950 -2.951167 
 1951 -2.889901 
 1952 -2.896804 
 1953  -2.9427 
 1954 -2.925324 
 1955 -2.948213 
 1956 -2.902173 
 1957 -2.873858 
 1958 -2.929317 
 1959 -2.900075 
 1960 -2.861223 
 1961 -2.891342 
 1962 -2.931999 
 1963 -3.089087 
 1964 -3.275837 
 1965 -3.120575 
 1966 -3.000418 
 1967 -3.013007 
 1968 -3.036976 
 1969 -3.027486 
 1970 -3.016406 
 1971 -2.896355 
 1972 -2.911627 
 1973 -2.881315 
 1974 -2.888237 
 1975 -2.913101 
 1976 -2.823292 
 1977 -2.832422 
 1978 -2.79973 
 1979 -2.764065 
 1980 -2.659571 
 1981 -2.687512 
 1982 -2.800182 
 1983 -2.939357 
 1984 -2.807749 
 1985 -2.776634 
 1986 -2.734077 
 1987 -2.683405 
 1988 -2.56388 
 1989 -2.582671 
 1990 -2.483951 
 1991 -2.630054 
 1992 -2.915887 
 1993 -2.722385 
 1994 -2.704999 
 1995 -2.671472 
 1996 -2.493164 
 1997 -2.477854 
 1998 -2.363765 
 1999 -2.385551 
 2000 -2.389029 
 2001 -2.280604 
 2002 -2.196383 
 2003 -2.271671 
 2004 -2.268477 
 2005 -2.241452