# year    value 
 1900 -4.597614 
 1901 -4.762559 
 1902  -4.7039 
 1903 -4.936484 
 1904 -4.952514 
 1905 -4.83943 
 1906 -4.808747 
 1907 -4.75861 
 1908 -4.748676 
 1909 -4.729469 
 1910 -4.732756 
 1911 -4.639106 
 1912 -4.652778 
 1913 -4.761086 
 1914 -4.778392 
 1915 -4.726839 
 1916 -4.644405 
 1917 -4.63489 
 1918 -4.624637 
 1919 -4.702748 
 1920 -4.573815 
 1921 -4.628371 
 1922 -4.629799 
 1923 -4.52457 
 1924 -4.600357 
 1925 -4.561293 
 1926 -4.628796 
 1927 -4.532271 
 1928 -4.576248 
 1929 -4.596385 
 1930 -4.612454 
 1931 -4.527732 
 1932 -4.563841 
 1933 -4.586522 
 1934 -4.603062 
 1935 -4.609847 
 1936 -4.51167 
 1937 -4.507133 
 1938 -4.527426 
 1939 -4.517467 
 1940 -4.571584 
 1941 -4.613844 
 1942 -4.491378 
 1943 -4.466564 
 1944 -4.438088 
 1945 -4.447869 
 1946 -4.515594 
 1947 -4.482995 
 1948 -4.444113 
 1949 -4.492342 
 1950 -4.444481 
 1951 -4.520581 
 1952 -4.50956 
 1953 -4.434452 
 1954 -4.428565 
 1955 -4.514224 
 1956 -4.478956 
 1957 -4.508048 
 1958 -4.483456 
 1959 -4.457188 
 1960 -4.446317 
 1961 -4.48703 
 1962 -4.494745 
 1963 -4.492387 
 1964 -4.705768 
 1965 -4.65884 
 1966 -4.628592 
 1967  -4.6247 
 1968 -4.562263 
 1969 -4.632025 
 1970 -4.588831 
 1971 -4.473838 
 1972 -4.416406 
 1973 -4.490837 
 1974 -4.428276 
 1975 -4.488996 
 1976 -4.406902 
 1977 -4.430284 
 1978 -4.41572 
 1979 -4.377072 
 1980 -4.270958 
 1981 -4.255214 
 1982 -4.21485 
 1983 -4.57069 
 1984 -4.418017 
 1985 -4.310801 
 1986 -4.322557 
 1987 -4.259583 
 1988 -4.134344 
 1989 -4.217044 
 1990 -4.115374 
 1991 -4.06274 
 1992 -4.483376 
 1993 -4.357083 
 1994 -4.289045 
 1995 -4.214597 
 1996 -4.059836 
 1997 -4.082987 
 1998 -4.010668 
 1999 -3.96542 
 2000 -3.878225 
 2001 -3.899437 
 2002 -3.773988 
 2003  -3.7767 
 2004 -3.872754 
 2005 -3.799481