# year    value 
 1900 -4.787075 
 1901 -4.970504 
 1902 -4.911779 
 1903 -5.155147 
 1904 -5.173968 
 1905 -5.04645 
 1906 -5.018175 
 1907 -4.967107 
 1908 -4.954667 
 1909 -4.940752 
 1910 -4.943928 
 1911 -4.846511 
 1912 -4.858647 
 1913 -4.974339 
 1914 -4.98983 
 1915 -4.93714 
 1916 -4.845191 
 1917 -4.835952 
 1918 -4.831201 
 1919 -4.912107 
 1920 -4.778185 
 1921 -4.838637 
 1922 -4.843766 
 1923 -4.73412 
 1924 -4.805025 
 1925 -4.774766 
 1926 -4.829907 
 1927 -4.743763 
 1928 -4.78339 
 1929 -4.806317 
 1930 -4.825731 
 1931 -4.741855 
 1932 -4.785381 
 1933 -4.802381 
 1934 -4.803933 
 1935 -4.814079 
 1936 -4.717179 
 1937 -4.719191 
 1938 -4.730674 
 1939  -4.7357 
 1940 -4.781784 
 1941 -4.823396 
 1942 -4.707957 
 1943 -4.677335 
 1944 -4.656255 
 1945 -4.650875 
 1946 -4.728707 
 1947 -4.690906 
 1948 -4.657262 
 1949 -4.703172 
 1950 -4.656021 
 1951 -4.724793 
 1952 -4.723901 
 1953 -4.641186 
 1954 -4.639691 
 1955 -4.720953 
 1956 -4.695241 
 1957 -4.712811 
 1958 -4.693174 
 1959 -4.674347 
 1960 -4.663681 
 1961 -4.698497 
 1962 -4.711379 
 1963 -4.704191 
 1964 -4.916207 
 1965 -4.879038 
 1966 -4.844521 
 1967 -4.838683 
 1968 -4.777376 
 1969 -4.858616 
 1970 -4.810329 
 1971 -4.688741 
 1972 -4.623894 
 1973 -4.703882 
 1974 -4.634545 
 1975 -4.705793 
 1976 -4.617806 
 1977 -4.647398 
 1978 -4.62767 
 1979 -4.595381 
 1980 -4.485679 
 1981 -4.466521 
 1982 -4.433363 
 1983 -4.796378 
 1984 -4.634354 
 1985 -4.533095 
 1986 -4.539389 
 1987 -4.482116 
 1988 -4.349547 
 1989 -4.431432 
 1990 -4.333354 
 1991 -4.270892 
 1992 -4.709604 
 1993 -4.578601 
 1994 -4.510205 
 1995 -4.41596 
 1996 -4.27523 
 1997 -4.295363 
 1998 -4.227541 
 1999 -4.176888 
 2000 -4.089878 
 2001  -4.1106 
 2002 -3.992458 
 2003 -3.990111 
 2004 -4.088196 
 2005 -4.01696