# year    value 
 1900 -0.6429824 
 1901 -0.6210157 
 1902 -0.7355121 
 1903 -1.087388 
 1904 -0.8916848 
 1905 -0.8075018 
 1906 -0.725646 
 1907 -0.6967886 
 1908 -0.747776 
 1909 -0.6988787 
 1910 -0.6607638 
 1911 -0.5881883 
 1912 -0.6951753 
 1913 -0.8834173 
 1914 -0.6947042 
 1915 -0.6409745 
 1916 -0.5181822 
 1917 -0.5769929 
 1918 -0.5919978 
 1919 -0.5584235 
 1920 -0.5297737 
 1921 -0.5924805 
 1922 -0.4768469 
 1923 -0.5100192 
 1924 -0.4446856 
 1925 -0.4818981 
 1926 -0.4387528 
 1927 -0.5037819 
 1928 -0.492922 
 1929 -0.5874449 
 1930 -0.5261569 
 1931 -0.5219583 
 1932 -0.5540007 
 1933 -0.5185022 
 1934 -0.4763362 
 1935 -0.479958 
 1936 -0.4502716 
 1937 -0.4960691 
 1938 -0.4626979 
 1939 -0.4399501 
 1940 -0.5059314 
 1941 -0.4817494 
 1942 -0.4584737 
 1943 -0.4467191 
 1944 -0.3766453 
 1945 -0.4418239 
 1946 -0.4676667 
 1947 -0.3845741 
 1948 -0.4138356 
 1949 -0.4296009 
 1950 -0.3850484 
 1951 -0.4755584 
 1952 -0.5100901 
 1953 -0.4257704 
 1954 -0.4454394 
 1955 -0.3839137 
 1956 -0.464027 
 1957 -0.4395151 
 1958 -0.4953249 
 1959 -0.4460025 
 1960 -0.483448 
 1961 -0.4880347 
 1962 -0.3974769 
 1963 -0.554678 
 1964 -0.7234868 
 1965 -0.6837905 
 1966 -0.6092668 
 1967 -0.6577709 
 1968 -0.7120692 
 1969 -0.696294 
 1970 -0.5459455 
 1971 -0.4710377 
 1972 -0.4757952 
 1973 -0.4034647 
 1974 -0.3989744 
 1975 -0.4870557 
 1976 -0.4569271 
 1977 -0.345171 
 1978 -0.3450227 
 1979 -0.3081727 
 1980 -0.2745996 
 1981 -0.1897837 
 1982 -0.3272454 
 1983 -0.5767645 
 1984 -0.3485853 
 1985 -0.3159489 
 1986 -0.2711295 
 1987 -0.2384191 
 1988 -0.1182802 
 1989 -0.07648808 
 1990 -0.06182167 
 1991 -0.08351602 
 1992 -0.5550354 
 1993 -0.3764961 
 1994 -0.2177848 
 1995 -0.09165553 
 1996 0.03533799 
 1997 0.03868813 
 1998 0.08795038 
 1999 0.1125999 
 2000 0.221012 
 2001 0.2599106 
 2002 0.3064068 
 2003 0.3104898 
 2004 0.3485934 
 2005 1.349782