# year value 1900 -1.740912 1901 -1.618579 1902 -1.792984 1903 -1.784513 1904 -1.844863 1905 -1.565563 1906 -1.823333 1907 -1.7582 1908 -1.608391 1909 -1.831844 1910 -1.642627 1911 -1.556958 1912 -1.809982 1913 -2.026896 1914 -2.144139 1915 -1.480644 1916 -1.614551 1917 -1.491214 1918 -1.50985 1919 -1.838868 1920 -1.829472 1921 -1.485794 1922 -1.407954 1923 -1.506513 1924 -1.449283 1925 -1.48597 1926 -1.595034 1927 -1.693099 1928 -1.54455 1929 -1.547159 1930 -1.729237 1931 -1.823907 1932 -1.722086 1933 -1.761279 1934 -1.533114 1935 -1.738009 1936 -1.583115 1937 -1.757101 1938 -1.580291 1939 -1.786178 1940 -1.787339 1941 -1.383827 1942 -1.528469 1943 -1.566663 1944 -1.61878 1945 -1.808896 1946 -1.640879 1947 -1.852422 1948 -1.471243 1949 -1.382494 1950 -1.460269 1951 -1.632724 1952 -1.61615 1953 -1.441398 1954 -1.705423 1955 -1.333301 1956 -1.584379 1957 -1.784805 1958 -1.574795 1959 -1.666233 1960 -1.3466 1961 -1.603115 1962 -1.546496 1963 -1.931118 1964 -1.822951 1965 -2.042065 1966 -1.621705 1967 -1.670004 1968 -1.64222 1969 -1.54907 1970 -1.696581 1971 -1.637261 1972 -1.560985 1973 -1.704012 1974 -1.675377 1975 -1.538495 1976 -1.487614 1977 -1.694005 1978 -1.462934 1979 -1.496136 1980 -1.541038 1981 -1.522816 1982 -1.337199 1983 -1.603805 1984 -1.585595 1985 -1.56722 1986 -1.419375 1987 -1.330796 1988 -1.285487 1989 -1.199694 1990 -1.108837 1991 -1.285135 1992 -1.441318 1993 -1.593647 1994 -1.433799 1995 -1.122743 1996 -1.375656 1997 -1.109621 1998 -1.109017 1999 -0.9702901 2000 -0.6707523 2001 -0.8045768 2002 -0.985423 2003 -0.728197 2004 -0.9292528 2005 -1.062171