# year    value 
 1900 -0.6873203 
 1901 -0.7667546 
 1902 -0.8032855 
 1903 -0.9518256 
 1904 -0.8872187 
 1905 -0.812387 
 1906 -0.7435785 
 1907 -0.7222262 
 1908 -0.705155 
 1909 -0.699518 
 1910 -0.6951265 
 1911 -0.6457691 
 1912 -0.6093165 
 1913 -0.7351711 
 1914 -0.6614282 
 1915 -0.6131525 
 1916 -0.5937945 
 1917 -0.6268106 
 1918 -0.5762194 
 1919 -0.6030113 
 1920 -0.5329248 
 1921 -0.506947 
 1922 -0.5611275 
 1923 -0.5719181 
 1924 -0.5518721 
 1925 -0.5270635 
 1926 -0.5759218 
 1927 -0.4759146 
 1928 -0.4538578 
 1929 -0.5225273 
 1930 -0.5875663 
 1931 -0.5377154 
 1932 -0.5256863 
 1933 -0.5796799 
 1934 -0.601041 
 1935 -0.4596281 
 1936 -0.4648046 
 1937 -0.4622284 
 1938 -0.4518233 
 1939 -0.4378237 
 1940 -0.461926 
 1941 -0.4080553 
 1942 -0.4279309 
 1943 -0.4553721 
 1944 -0.4236559 
 1945 -0.4026186 
 1946 -0.4690642 
 1947 -0.457949 
 1948 -0.4268484 
 1949 -0.3494868 
 1950 -0.4560744 
 1951 -0.4021596 
 1952 -0.4730205 
 1953 -0.4283628 
 1954 -0.4048354 
 1955 -0.4324545 
 1956 -0.380862 
 1957 -0.3964143 
 1958 -0.4094145 
 1959 -0.3876755 
 1960 -0.3925718 
 1961 -0.3906229 
 1962 -0.4505311 
 1963 -0.5776411 
 1964 -0.7394454 
 1965 -0.622593 
 1966 -0.5997842 
 1967 -0.5667288 
 1968 -0.5670372 
 1969 -0.5729109 
 1970 -0.4956503 
 1971 -0.3924987 
 1972 -0.3829592 
 1973 -0.3701483 
 1974 -0.4088938 
 1975 -0.3843325 
 1976 -0.3142878 
 1977 -0.3366529 
 1978 -0.3178332 
 1979 -0.257741 
 1980 -0.1312562 
 1981 -0.1842188 
 1982 -0.2878085 
 1983 -0.4022722 
 1984 -0.2650089 
 1985 -0.3393967 
 1986 -0.2631818 
 1987 -0.1163483 
 1988 -0.08612638 
 1989 -0.07329814 
 1990 0.00275523 
 1991 -0.1681361 
 1992 -0.3775768 
 1993 -0.2386667 
 1994 -0.2523803 
 1995 -0.180188 
 1996 0.0333493 
 1997 0.04834999 
 1998 0.1023069 
 1999 0.1405433 
 2000 0.1335613 
 2001 0.2585124 
 2002 0.3057675 
 2003 0.1798963 
 2004 0.2341582 
 2005 0.1331524