# year    value 
 1900 -0.4975139 
 1901 -0.2031585 
 1902 -0.7108588 
 1903 -0.7585488 
 1904 -0.6643419 
 1905 -0.5236037 
 1906 -0.1515927 
 1907 -0.255444 
 1908 -0.3230924 
 1909 -0.5068392 
 1910 -0.4829719 
 1911 -0.3911202 
 1912 -0.6253257 
 1913 -0.5549189 
 1914 -0.3147835 
 1915 -0.3011175 
 1916 -0.3160723 
 1917 -0.4926685 
 1918 -0.1189026 
 1919 -0.2748152 
 1920 -0.505626 
 1921 -0.1694293 
 1922 -0.3289532 
 1923 -0.3108959 
 1924 -0.4435456 
 1925 -0.07184568 
 1926 -0.3445233 
 1927 -0.2649815 
 1928 -0.4035981 
 1929 -0.2059817 
 1930 -0.06636894 
 1931 -0.2567219 
 1932 -0.1822933 
 1933 -0.3961619 
 1934 -0.1308103 
 1935 -0.2429237 
 1936 -0.4835939 
 1937 -0.05013965 
 1938 -0.3919396 
 1939 -0.2260505 
 1940 -0.319488 
 1941 -0.04830791 
 1942 -0.5023206 
 1943 -0.2701132 
 1944 -0.06321354 
 1945 -0.4003112 
 1946 -0.2681798 
 1947 -0.0939462 
 1948 -0.3016683 
 1949 -0.1188437 
 1950 -0.2959383 
 1951 -0.07671054 
 1952 -0.09747657 
 1953 -0.1436271 
 1954 -0.08849599 
 1955 -0.319257 
 1956 -0.3856613 
 1957 -0.2427307 
 1958 -0.3787546 
 1959 -0.3554901 
 1960 -0.2158637 
 1961 -0.4689049 
 1962 -0.2960687 
 1963 -0.394357 
 1964 -0.4883181 
 1965 -0.2151408 
 1966 -0.3175032 
 1967 -0.2863347 
 1968 -0.3805054 
 1969 -0.3750418 
 1970 -0.1764855 
 1971 -0.2954975 
 1972 -0.06558453 
 1973 -0.4593803 
 1974 -0.4291095 
 1975 -0.2173512 
 1976 -0.2157187 
 1977 -0.1359041 
 1978 -0.1283033 
 1979 -0.1319966 
 1980 -0.1681481 
 1981 0.05458019 
 1982 0.09736545 
 1983 -0.5204663 
 1984 -0.2371685 
 1985 -0.1911784 
 1986 -0.123344 
 1987 0.03432735 
 1988 0.2551906 
 1989 0.1900533 
 1990 0.1222334 
 1991 0.02658876 
 1992 -0.1669549 
 1993 -0.298164 
 1994 0.1026946 
 1995 0.1012417 
 1996 0.2852271 
 1997 0.5330795 
 1998 0.3409237 
 1999 0.6493243 
 2000 0.5779092 
 2001 0.4710655 
 2002 0.7718023 
 2003 0.5955691 
 2004 0.4234043 
 2005 0.8030371