# year    value 
 1900 -0.6717172 
 1901 -0.7381684 
 1902 -0.772903 
 1903 -0.9878825 
 1904 -0.9034155 
 1905 -0.8097931 
 1906 -0.7637989 
 1907 -0.7382845 
 1908 -0.7456017 
 1909 -0.7134291 
 1910 -0.71436 
 1911 -0.6334709 
 1912 -0.6732719 
 1913 -0.7218204 
 1914 -0.6903811 
 1915 -0.640544 
 1916 -0.6102829 
 1917 -0.6310629 
 1918 -0.6092171 
 1919 -0.6329364 
 1920 -0.5685182 
 1921 -0.5639078 
 1922 -0.5565781 
 1923 -0.5807819 
 1924 -0.5746519 
 1925 -0.5624101 
 1926 -0.5736529 
 1927 -0.4986084 
 1928 -0.522998 
 1929 -0.55948 
 1930 -0.5923441 
 1931 -0.5676383 
 1932 -0.5426357 
 1933 -0.5957044 
 1934 -0.6585573 
 1935 -0.5053584 
 1936 -0.4541294 
 1937 -0.4951753 
 1938 -0.4343518 
 1939 -0.4707448 
 1940 -0.5115638 
 1941 -0.4786832 
 1942 -0.4401563 
 1943 -0.4252824 
 1944 -0.432671 
 1945 -0.4673381 
 1946 -0.5036144 
 1947 -0.481112 
 1948 -0.4409146 
 1949 -0.3825248 
 1950 -0.4721194 
 1951 -0.4374249 
 1952 -0.4682185 
 1953 -0.4710838 
 1954 -0.4341857 
 1955 -0.4599811 
 1956 -0.3930018 
 1957 -0.41908 
 1958 -0.4159724 
 1959 -0.3851447 
 1960 -0.3748913 
 1961 -0.3990756 
 1962 -0.4345486 
 1963 -0.5884207 
 1964 -0.800509 
 1965 -0.6489385 
 1966 -0.601319 
 1967 -0.5853659 
 1968 -0.5393822 
 1969 -0.5435688 
 1970 -0.4901717 
 1971 -0.3989443 
 1972 -0.4158929 
 1973 -0.3848519 
 1974 -0.4083754 
 1975 -0.4125842 
 1976 -0.3601633 
 1977 -0.3783272 
 1978 -0.3059922 
 1979 -0.2707146 
 1980 -0.1678585 
 1981 -0.1811676 
 1982 -0.3048083 
 1983 -0.4108371 
 1984 -0.2748815 
 1985 -0.3131648 
 1986 -0.2567827 
 1987 -0.1426128 
 1988 -0.07639804 
 1989 -0.06786762 
 1990 0.003369608 
 1991 -0.1815359 
 1992 -0.3705773 
 1993 -0.2519043 
 1994 -0.2414267 
 1995 -0.156375 
 1996 -0.001074148 
 1997 0.04653357 
 1998 0.08787821 
 1999 0.1147066 
 2000 0.1352877 
 2001 0.2462246 
 2002 0.2998062 
 2003 0.2155895 
 2004 0.262157 
 2005 0.1905975