# year    value 
 1900 -11.02104 
 1901 -11.07203 
 1902 -11.05541 
 1903 -11.34144 
 1904 -11.71395 
 1905 -11.3355 
 1906 -11.34156 
 1907 -11.07993 
 1908 -10.86471 
 1909 -11.19347 
 1910 -11.28852 
 1911 -11.60263 
 1912 -11.2532 
 1913 -11.30728 
 1914 -11.20843 
 1915 -10.93489 
 1916 -11.45597 
 1917 -11.3264 
 1918 -10.99482 
 1919 -11.13455 
 1920 -11.18077 
 1921 -10.6879 
 1922 -10.93627 
 1923 -10.9134 
 1924 -11.48637 
 1925 -10.86406 
 1926 -10.9046 
 1927 -11.1058 
 1928 -11.15292 
 1929 -10.98618 
 1930 -11.31068 
 1931 -10.99182 
 1932 -10.85551 
 1933 -11.2236 
 1934 -11.18563 
 1935 -11.08204 
 1936 -11.12391 
 1937 -11.15139 
 1938 -10.74147 
 1939 -11.0718 
 1940 -11.15634 
 1941 -10.81717 
 1942 -10.94094 
 1943 -10.79049 
 1944 -11.04724 
 1945 -11.11638 
 1946 -11.19945 
 1947 -11.07765 
 1948 -11.18025 
 1949 -11.00918 
 1950 -11.11642 
 1951 -10.70315 
 1952 -11.03301 
 1953 -10.59611 
 1954 -10.91988 
 1955 -11.25586 
 1956 -11.01367 
 1957 -11.12219 
 1958 -11.03304 
 1959 -10.83852 
 1960 -10.8779 
 1961 -10.8185 
 1962 -10.91917 
 1963 -10.87483 
 1964 -11.14537 
 1965 -11.31146 
 1966 -11.22897 
 1967 -11.29589 
 1968 -11.11859 
 1969 -11.13707 
 1970 -11.08657 
 1971 -11.12942 
 1972 -11.04953 
 1973 -11.0469 
 1974 -11.18931 
 1975 -10.89527 
 1976 -10.97896 
 1977 -11.13301 
 1978 -10.64708 
 1979 -10.6914 
 1980 -11.07968 
 1981 -10.66819 
 1982 -10.81965 
 1983 -11.04681 
 1984 -10.99729 
 1985 -11.30136 
 1986 -10.71307 
 1987 -10.84149 
 1988 -10.75176 
 1989 -10.77873 
 1990 -10.73181 
 1991 -10.55098 
 1992 -10.77765 
 1993 -11.42416 
 1994 -10.61521 
 1995 -11.09752 
 1996 -10.61204 
 1997 -10.34125 
 1998 -9.996982 
 1999 -10.68194 
 2000 -10.38172 
 2001 -10.53057 
 2002 -10.63726 
 2003 -10.00258 
 2004 -10.45342 
 2005 -10.03896