# year    value 
 1900 -0.7209498 
 1901 -0.7467032 
 1902 -0.7938759 
 1903 -1.071719 
 1904 -1.004435 
 1905 -0.8925149 
 1906 -0.8466183 
 1907 -0.8438777 
 1908 -0.8113546 
 1909 -0.8097905 
 1910 -0.7773977 
 1911 -0.761234 
 1912 -0.8195684 
 1913 -0.9081586 
 1914 -0.831549 
 1915 -0.7653088 
 1916 -0.7167901 
 1917 -0.690126 
 1918 -0.6644562 
 1919 -0.6809155 
 1920 -0.6507679 
 1921 -0.6415721 
 1922 -0.6163736 
 1923 -0.6184578 
 1924 -0.6323659 
 1925 -0.6109188 
 1926 -0.6059311 
 1927 -0.5814836 
 1928 -0.5641084 
 1929 -0.6279048 
 1930 -0.6369121 
 1931 -0.6164551 
 1932 -0.5948634 
 1933 -0.6651592 
 1934 -0.6491881 
 1935 -0.6001094 
 1936 -0.5602067 
 1937 -0.5298997 
 1938 -0.5406677 
 1939 -0.5386768 
 1940 -0.5630125 
 1941 -0.535079 
 1942 -0.5477505 
 1943 -0.5385647 
 1944 -0.5064835 
 1945 -0.5240884 
 1946 -0.5758757 
 1947 -0.5284303 
 1948 -0.5014096 
 1949 -0.4771352 
 1950 -0.4972867 
 1951 -0.5062084 
 1952 -0.5256989 
 1953 -0.5066534 
 1954 -0.5297946 
 1955 -0.5180472 
 1956 -0.5048767 
 1957 -0.4961665 
 1958 -0.5195712 
 1959 -0.4938127 
 1960 -0.4823156 
 1961 -0.4975658 
 1962 -0.5242782 
 1963 -0.621854 
 1964 -0.7700201 
 1965 -0.7201105 
 1966 -0.6710194 
 1967 -0.6434817 
 1968 -0.6620632 
 1969 -0.669325 
 1970 -0.6039298 
 1971 -0.5195904 
 1972 -0.4860193 
 1973 -0.4836268 
 1974 -0.4905368 
 1975 -0.4983706 
 1976 -0.466193 
 1977 -0.4480774 
 1978 -0.3741088 
 1979 -0.3215525 
 1980 -0.2721413 
 1981 -0.2210186 
 1982 -0.3752078 
 1983 -0.5344193 
 1984 -0.3834748 
 1985 -0.3381276 
 1986 -0.3201811 
 1987 -0.2221329 
 1988 -0.1416405 
 1989 -0.1049127 
 1990 -0.03853033 
 1991 -0.1238959 
 1992 -0.4407621 
 1993 -0.3099133 
 1994 -0.204577 
 1995 -0.1373034 
 1996 -0.04030006 
 1997 0.05203345 
 1998 0.0980532 
 1999 0.1245295 
 2000 0.1927276 
 2001 0.2725196 
 2002 0.3117502 
 2003 0.3135241 
 2004 0.3164704 
 2005 0.9142831