# year    value 
 1940 -0.5798728 
 1941 -0.3489473 
 1942 -0.5960924 
 1943 -0.5533913 
 1944 -0.4790536 
 1945 -0.6893237 
 1946 -0.5586371 
 1947 -0.6260254 
 1948 -0.5601693 
 1949 -0.3757555 
 1950 -0.5529735 
 1951 -0.4656186 
 1952 -0.5258157 
 1953 -0.4462583 
 1954 -0.5237234 
 1955 -0.4498752 
 1956 -0.543549 
 1957 -0.5326089 
 1958 -0.5588729 
 1959 -0.5836224 
 1960 -0.4762457 
 1961 -0.5817524 
 1962 -0.5852507 
 1963 -0.7415302 
 1964 -0.8063916 
 1965 -0.8105109 
 1966 -0.7012604 
 1967 -0.7100352 
 1968 -0.6938251 
 1969 -0.7326726 
 1970 -0.5811381 
 1971 -0.7179281 
 1972 -0.5561369 
 1973 -0.6410335 
 1974 -0.5815769 
 1975 -0.5072774 
 1976 -0.5848015 
 1977 -0.4559371 
 1978 -0.3939137 
 1979 -0.367734 
 1980 -0.4794064 
 1981 -0.2451872 
 1982 -0.3736071 
 1983 -0.6344209 
 1984 -0.5218358 
 1985 -0.4651648 
 1986 -0.2992436 
 1987 -0.2805649 
 1988 -0.1754541 
 1989 -0.05831418 
 1990 0.002601335 
 1991 -0.2897618 
 1992 -0.4039089 
 1993 -0.4962846 
 1994 -0.2259093 
 1995 -0.03066458 
 1996 -0.06480318 
 1997 0.08150555 
 1998 0.06339915 
 1999 0.1125258 
 2000 0.3020179 
 2001 0.3594646 
 2002 0.2680402 
 2003 0.464059 
 2004 0.3373924 
 2005 0.9428115