# year    value 
 1900 -0.6082789 
 1901 -0.673537 
 1902 -0.7242143 
 1903 -0.9135025 
 1904 -0.8376174 
 1905 -0.7475618 
 1906 -0.7116287 
 1907 -0.6744314 
 1908 -0.6782433 
 1909 -0.6462634 
 1910 -0.6333007 
 1911 -0.5990564 
 1912 -0.5933318 
 1913 -0.6580689 
 1914 -0.6394305 
 1915 -0.5770443 
 1916 -0.5572236 
 1917 -0.5733283 
 1918 -0.563167 
 1919 -0.5750956 
 1920 -0.528524 
 1921 -0.522903 
 1922 -0.5112218 
 1923 -0.5181446 
 1924 -0.5231482 
 1925 -0.501043 
 1926 -0.5164854 
 1927 -0.4645653 
 1928 -0.455296 
 1929 -0.5162735 
 1930 -0.528414 
 1931 -0.5219755 
 1932 -0.4972261 
 1933 -0.554433 
 1934 -0.5952858 
 1935 -0.4504817 
 1936 -0.4050682 
 1937 -0.421247 
 1938 -0.416822 
 1939 -0.4123304 
 1940 -0.4587178 
 1941 -0.4283681 
 1942 -0.4037765 
 1943 -0.4153408 
 1944  -0.3693 
 1945 -0.4118789 
 1946 -0.4537683 
 1947 -0.42201 
 1948 -0.3808797 
 1949 -0.3357777 
 1950 -0.4237986 
 1951 -0.3777208 
 1952 -0.3888229 
 1953 -0.4226199 
 1954 -0.3980244 
 1955 -0.4227142 
 1956 -0.3599559 
 1957 -0.3643496 
 1958 -0.3954249 
 1959 -0.3767004 
 1960 -0.3569179 
 1961 -0.3591197 
 1962 -0.4135666 
 1963 -0.5371939 
 1964 -0.7305752 
 1965 -0.5794429 
 1966 -0.5281604 
 1967 -0.5228637 
 1968 -0.5036211 
 1969 -0.5032006 
 1970 -0.4638359 
 1971 -0.3571472 
 1972 -0.3693004 
 1973 -0.3542144 
 1974 -0.3766208 
 1975 -0.3656852 
 1976 -0.3197392 
 1977 -0.3281418 
 1978 -0.2926293 
 1979 -0.2435267 
 1980 -0.1523272 
 1981 -0.1634963 
 1982 -0.293801 
 1983 -0.3905546 
 1984 -0.2630462 
 1985 -0.2532349 
 1986 -0.2536002 
 1987 -0.1680136 
 1988 -0.05296966 
 1989 -0.06142674 
 1990 0.01774312 
 1991 -0.1373865 
 1992 -0.3561631 
 1993 -0.2177042 
 1994 -0.2053479 
 1995 -0.1583358 
 1996 0.0001029422 
 1997 0.05072899 
 1998 0.09195331 
 1999 0.1032769 
 2000 0.1249085 
 2001 0.2231214 
 2002 0.2940951 
 2003 0.2000148 
 2004 0.2222902 
 2005 0.1411713