# year    value 
 1900 -13.43167 
 1901 -13.01312 
 1902 -12.95298 
 1903 -13.25936 
 1904 -13.23474 
 1905 -13.20059 
 1906 -13.14281 
 1907 -13.04652 
 1908 -13.10136 
 1909 -13.12644 
 1910 -13.03514 
 1911 -13.05055 
 1912 -12.97668 
 1913 -13.25195 
 1914 -13.20187 
 1915 -13.13911 
 1916 -13.11621 
 1917 -13.0456 
 1918 -13.04086 
 1919 -12.9229 
 1920 -13.03202 
 1921 -12.85349 
 1922 -12.75518 
 1923 -12.9692 
 1924 -12.9268 
 1925 -12.90914 
 1926 -12.77788 
 1927 -12.90987 
 1928 -12.73908 
 1929 -12.89796 
 1930 -12.8058 
 1931 -12.83858 
 1932 -12.75087 
 1933 -12.96744 
 1934 -12.85999 
 1935 -12.91702 
 1936 -12.75769 
 1937 -12.86649 
 1938 -12.68153 
 1939 -12.86823 
 1940 -12.80375 
 1941 -12.75054 
 1942 -12.76371 
 1943 -12.71247 
 1944 -12.74826 
 1945 -12.75844 
 1946 -12.9238 
 1947 -12.83323 
 1948 -12.82545 
 1949 -12.75016 
 1950 -12.7689 
 1951 -12.82213 
 1952 -12.90413 
 1953 -12.6697 
 1954 -12.84312 
 1955 -12.69417 
 1956 -12.78289 
 1957 -12.78559 
 1958 -12.81948 
 1959 -12.72587 
 1960 -12.80748 
 1961 -12.66707 
 1962 -12.72051 
 1963 -12.80789 
 1964 -13.02183 
 1965 -13.02739 
 1966 -12.94998 
 1967 -13.06261 
 1968 -12.95969 
 1969 -13.03518 
 1970 -12.92606 
 1971 -12.88252 
 1972 -12.82823 
 1973 -12.75393 
 1974 -12.66279 
 1975 -12.77929 
 1976 -12.83612 
 1977 -12.71567 
 1978 -12.56025 
 1979 -12.54151 
 1980 -12.57927 
 1981 -12.32782 
 1982 -12.37291 
 1983 -12.79837 
 1984 -12.59254 
 1985 -12.76361 
 1986 -12.56022 
 1987 -12.38469 
 1988 -12.39046 
 1989 -12.33326 
 1990 -12.08039 
 1991 -12.11417 
 1992 -12.51532 
 1993 -12.54822 
 1994 -12.51118 
 1995 -12.26299 
 1996 -12.12934 
 1997 -12.22151 
 1998 -12.02466 
 1999 -12.24795 
 2000 -11.97006 
 2001 -11.87888 
 2002 -11.83916 
 2003 -11.5971 
 2004 -11.66404 
 2005 -11.67221