# year    value 
 1900 -0.5173882 
 1901 -0.1991265 
 1902 -0.7004039 
 1903 -0.7566382 
 1904 -0.6592279 
 1905 -0.5167089 
 1906 -0.1614899 
 1907 -0.2594027 
 1908 -0.3319345 
 1909 -0.5102209 
 1910 -0.4835945 
 1911 -0.3955587 
 1912 -0.6392253 
 1913 -0.5678191 
 1914 -0.3005159 
 1915 -0.2947121 
 1916 -0.3191251 
 1917 -0.4900705 
 1918 -0.1178243 
 1919 -0.264855 
 1920 -0.5076565 
 1921 -0.1851727 
 1922 -0.3349822 
 1923 -0.3273089 
 1924 -0.4586277 
 1925 -0.0666694 
 1926 -0.3566505 
 1927 -0.2812307 
 1928 -0.4047734 
 1929 -0.2176469 
 1930 -0.07160224 
 1931 -0.2585174 
 1932 -0.1755103 
 1933 -0.3985054 
 1934 -0.1300617 
 1935 -0.2400354 
 1936 -0.4792578 
 1937 -0.05049745 
 1938 -0.3890464 
 1939 -0.2244881 
 1940 -0.3206934 
 1941 -0.04394146 
 1942 -0.4986261 
 1943 -0.2758625 
 1944 -0.05283005 
 1945 -0.4096881 
 1946 -0.280312 
 1947 -0.1028615 
 1948 -0.3050857 
 1949 -0.1339099 
 1950 -0.3020294 
 1951 -0.09148011 
 1952 -0.09711456 
 1953 -0.1520972 
 1954 -0.08289658 
 1955 -0.3327844 
 1956 -0.3955635 
 1957 -0.2540734 
 1958 -0.391917 
 1959 -0.3574226 
 1960 -0.2246658 
 1961 -0.4808785 
 1962 -0.3012969 
 1963 -0.3904278 
 1964 -0.4989025 
 1965 -0.219055 
 1966 -0.3049813 
 1967 -0.2805763 
 1968 -0.3685144 
 1969 -0.3892079 
 1970 -0.1770759 
 1971 -0.3006968 
 1972 -0.0694006 
 1973 -0.4598635 
 1974 -0.4453933 
 1975 -0.2227128 
 1976 -0.2196868 
 1977 -0.139388 
 1978 -0.129548 
 1979 -0.1406699 
 1980 -0.1662635 
 1981 0.05454549 
 1982 0.09680653 
 1983 -0.5180538 
 1984 -0.2373875 
 1985 -0.1887453 
 1986 -0.1241088 
 1987 0.03259907 
 1988 0.2600906 
 1989 0.197096 
 1990 0.1051521 
 1991 0.01946436 
 1992 -0.1800366 
 1993 -0.291815 
 1994 0.1028537 
 1995 0.08729475 
 1996 0.2747978 
 1997 0.545054 
 1998 0.3297508 
 1999 0.6500514 
 2000 0.5705334 
 2001 0.467684 
 2002 0.7634401 
 2003 0.5837411 
 2004 0.4167883 
 2005 0.8038744