# year value 1900 -1.416087 1901 -1.366527 1902 -1.433839 1903 -1.557194 1904 -1.562447 1905 -1.533038 1906 -1.426514 1907 -1.424219 1908 -1.347064 1909 -1.394063 1910 -1.343839 1911 -1.33884 1912 -1.269627 1913 -1.337821 1914 -1.373145 1915 -1.332299 1916 -1.315663 1917 -1.335564 1918 -1.316249 1919 -1.303444 1920 -1.286932 1921 -1.313866 1922 -1.315622 1923 -1.3439 1924 -1.316562 1925 -1.289055 1926 -1.329697 1927 -1.333311 1928 -1.285612 1929 -1.273553 1930 -1.248409 1931 -1.319047 1932 -1.239363 1933 -1.235178 1934 -1.30594 1935 -1.268867 1936 -1.260893 1937 -1.222211 1938 -1.259404 1939 -1.245989 1940 -1.231074 1941 -1.251949 1942 -1.227242 1943 -1.300539 1944 -1.226557 1945 -1.245305 1946 -1.203428 1947 -1.204058 1948 -1.181745 1949 -1.178522 1950 -1.244915 1951 -1.213377 1952 -1.229978 1953 -1.156635 1954 -1.180842 1955 -1.218831 1956 -1.205313 1957 -1.176973 1958 -1.201275 1959 -1.088696 1960 -1.174491 1961 -1.175086 1962 -1.164432 1963 -1.329321 1964 -1.394119 1965 -1.310124 1966 -1.272923 1967 -1.234843 1968 -1.216358 1969 -1.240204 1970 -1.171506 1971 -1.14608 1972 -1.1252 1973 -1.156267 1974 -1.188988 1975 -1.158805 1976 -1.212872 1977 -1.092463 1978 -1.093487 1979 -1.018488 1980 -1.000475 1981 -0.9724687 1982 -1.08088 1983 -1.14167 1984 -1.011801 1985 -1.03913 1986 -1.052673 1987 -1.003705 1988 -0.9180125 1989 -0.8441894 1990 -0.8585721 1991 -1.023075 1992 -1.107016 1993 -1.023032 1994 -0.9374753 1995 -0.9158295 1996 -0.8513885 1997 -0.8068501 1998 -0.7985081 1999 -0.798778 2000 -0.7151067 2001 -0.7029786 2002 -0.6910104 2003 -0.6724083 2004 -0.6844186 2005 -0.6225744