# year    value 
 1900 -0.6103556 
 1901 -0.621065 
 1902 -0.6786977 
 1903 -1.139273 
 1904 -1.048398 
 1905 -0.8912011 
 1906 -0.7324963 
 1907 -0.6427242 
 1908 -0.5388573 
 1909 -0.7053238 
 1910 -0.6606796 
 1911 -0.8065241 
 1912 -0.9443181 
 1913 -0.846764 
 1914 -0.6529349 
 1915 -0.6609027 
 1916 -0.7795789 
 1917 -0.5273928 
 1918 -0.4944897 
 1919 -0.5967761 
 1920 -0.6803508 
 1921 -0.5035316 
 1922 -0.5151739 
 1923 -0.5754445 
 1924 -0.6195142 
 1925 -0.4706277 
 1926 -0.5648724 
 1927 -0.5109965 
 1928 -0.6077692 
 1929 -0.6205923 
 1930 -0.5886674 
 1931 -0.5787607 
 1932 -0.5746683 
 1933 -0.5423281 
 1934 -0.6652164 
 1935 -0.5437251 
 1936 -0.5982069 
 1937 -0.4739389 
 1938 -0.5129628 
 1939 -0.5306732 
 1940 -0.4580893 
 1941 -0.3922346 
 1942 -0.5964733 
 1943 -0.4420944 
 1944 -0.4830012 
 1945 -0.5215215 
 1946 -0.5103854 
 1947 -0.5404928 
 1948 -0.5559643 
 1949 -0.4582927 
 1950 -0.4514511 
 1951 -0.4268812 
 1952 -0.4701585 
 1953 -0.3357296 
 1954 -0.4772797 
 1955 -0.5329655 
 1956 -0.5124194 
 1957 -0.5439541 
 1958 -0.6040157 
 1959 -0.5463618 
 1960 -0.550644 
 1961 -0.4602843 
 1962 -0.4977951 
 1963 -0.4944696 
 1964 -0.8443307 
 1965 -0.7494121 
 1966 -0.7861576 
 1967 -0.7432607 
 1968 -0.6453682 
 1969 -0.7264907 
 1970 -0.6051148 
 1971 -0.4944567 
 1972 -0.5642206 
 1973 -0.5449187 
 1974 -0.4936903 
 1975 -0.528886 
 1976 -0.4639456 
 1977 -0.4275927 
 1978 -0.3750011 
 1979 -0.2744016 
 1980 -0.3318376 
 1981 -0.2257966 
 1982 -0.4683207 
 1983 -0.6625561 
 1984 -0.4548633 
 1985 -0.3729226 
 1986 -0.1446456 
 1987 -0.3411952 
 1988 -0.1014651 
 1989 -0.1348764 
 1990 -0.1363615 
 1991 -0.13745 
 1992 -0.5920005 
 1993 -0.4846727 
 1994 -0.08747063 
 1995 -0.3009997 
 1996 -0.08028663 
 1997 0.1475447 
 1998 0.2582757 
 1999 0.002511452 
 2000 0.3635166 
 2001 0.2596461 
 2002 0.3142184 
 2003 0.4148105 
 2004 0.4031678 
 2005 1.256673