# year    value 
 1900 0.184839 
 1901 0.09425741 
 1902 0.1030898 
 1903 -0.1821644 
 1904 -0.1302183 
 1905 0.02152864 
 1906 0.08122904 
 1907 0.1062699 
 1908 0.07694518 
 1909 0.1134369 
 1910 0.1620227 
 1911 0.2092937 
 1912 0.2332599 
 1913 0.1085474 
 1914 0.1333647 
 1915 0.1227758 
 1916 0.2726538 
 1917 0.2166692 
 1918 0.1664074 
 1919 0.2308993 
 1920 0.2353786 
 1921 0.254312 
 1922 0.2774242 
 1923 0.2775896 
 1924 0.3007307 
 1925 0.335751 
 1926 0.3030533 
 1927 0.3193024 
 1928 0.2745769 
 1929 0.2986113 
 1930 0.2223054 
 1931 0.3005091 
 1932 0.3058573 
 1933 0.2997249 
 1934 0.199602 
 1935 0.3079371 
 1936 0.3922857 
 1937 0.319411 
 1938 0.385833 
 1939 0.3632976 
 1940 0.3738633 
 1941 0.3004862 
 1942 0.3425856 
 1943 0.3647809 
 1944 0.411641 
 1945 0.3573162 
 1946 0.3403045 
 1947 0.3617579 
 1948 0.3918424 
 1949 0.4357354 
 1950 0.4100341 
 1951 0.3910827 
 1952 0.3863648 
 1953 0.4174155 
 1954 0.4074052 
 1955 0.3470456 
 1956 0.3888082 
 1957 0.4305403 
 1958 0.3714339 
 1959 0.3841501 
 1960 0.4417382 
 1961 0.3903064 
 1962 0.399414 
 1963 0.323697 
 1964 0.184136 
 1965 0.1887661 
 1966 0.1920021 
 1967 0.2573505 
 1968 0.2623131 
 1969 0.2433885 
 1970 0.2841791 
 1971 0.3688742 
 1972 0.4193259 
 1973 0.4757137 
 1974 0.4091851 
 1975 0.4039855 
 1976 0.5030761 
 1977 0.4647392 
 1978 0.5319593 
 1979 0.4987217 
 1980 0.6577249 
 1981 0.6741321 
 1982 0.5774485 
 1983 0.3661633 
 1984 0.4936807 
 1985 0.5676571 
 1986 0.5282329 
 1987 0.5975004 
 1988 0.7639935 
 1989 0.7484133 
 1990 0.7927823 
 1991 0.8203833 
 1992 0.3188353 
 1993 0.5206713 
 1994 0.6232579 
 1995 0.6671946 
 1996 0.7812442 
 1997 0.8518862 
 1998 0.9295912 
 1999 0.9513227 
 2000 0.951717 
 2001 1.003755 
 2002 1.122643 
 2003 1.076516 
 2004  1.09838 
 2005  1.10514