# year value 1900 -1.25785 1901 -1.310243 1902 -1.453953 1903 -1.609276 1904 -1.641973 1905 -1.332179 1906 -1.388644 1907 -1.445727 1908 -1.35877 1909 -1.462303 1910 -1.350774 1911 -1.401645 1912 -1.326832 1913 -1.629132 1914 -1.401541 1915 -1.401517 1916 -1.243649 1917 -1.25158 1918 -1.303281 1919 -1.206707 1920 -1.149146 1921 -1.22736 1922 -1.128385 1923 -1.200753 1924 -1.048614 1925 -1.233505 1926 -1.209783 1927 -1.261299 1928 -1.160891 1929 -1.240104 1930 -1.314753 1931 -1.254361 1932 -1.130554 1933 -1.285513 1934 -1.097521 1935 -1.240043 1936 -1.187401 1937 -1.164972 1938 -1.197805 1939 -1.141133 1940 -1.178647 1941 -1.113441 1942 -1.215219 1943 -1.250486 1944 -1.10733 1945 -1.123547 1946 -1.132781 1947 -1.112955 1948 -1.024369 1949 -1.14782 1950 -1.058958 1951 -1.114534 1952 -1.145298 1953 -1.011245 1954 -1.123942 1955 -0.9980382 1956 -1.214957 1957 -1.032465 1958 -1.120435 1959 -1.122628 1960 -1.037601 1961 -1.152932 1962 -1.023107 1963 -1.137421 1964 -1.256396 1965 -1.311757 1966 -1.288239 1967 -1.267635 1968 -1.300292 1969 -1.343868 1970 -1.287389 1971 -1.189939 1972 -1.111172 1973 -1.073704 1974 -1.193675 1975 -1.157904 1976 -1.0209 1977 -1.049963 1978 -0.9183241 1979 -1.002155 1980 -0.945135 1981 -0.9238281 1982 -0.7922552 1983 -1.235064 1984 -0.9346909 1985 -0.9969018 1986 -0.8978382 1987 -0.9128545 1988 -0.7883805 1989 -0.6046931 1990 -0.6692882 1991 -0.6345482 1992 -1.088367 1993 -1.116345 1994 -0.8192272 1995 -0.7786388 1996 -0.6197057 1997 -0.6152357 1998 -0.5206833 1999 -0.6026214 2000 -0.2827254 2001 -0.3149144 2002 -0.4051069 2003 -0.3274007 2004 -0.2189822 2005 -0.3071326