# year value 1900 -1.760483 1901 -1.653006 1902 -1.831447 1903 -1.803537 1904 -1.865293 1905 -1.594055 1906 -1.846043 1907 -1.794004 1908 -1.629662 1909 -1.865305 1910 -1.670915 1911 -1.578443 1912 -1.834009 1913 -2.038225 1914 -2.15062 1915 -1.499942 1916 -1.638082 1917 -1.51515 1918 -1.52584 1919 -1.85491 1920 -1.83841 1921 -1.519137 1922 -1.439013 1923 -1.529218 1924 -1.459393 1925 -1.501085 1926 -1.611041 1927 -1.694597 1928 -1.561879 1929 -1.571203 1930 -1.763047 1931 -1.842441 1932 -1.746358 1933 -1.784533 1934 -1.534826 1935 -1.753994 1936 -1.602719 1937 -1.75371 1938 -1.581579 1939 -1.798604 1940 -1.806092 1941 -1.409081 1942 -1.534893 1943 -1.581086 1944 -1.625289 1945 -1.815853 1946 -1.651466 1947 -1.879273 1948 -1.465907 1949 -1.386853 1950 -1.438418 1951 -1.657566 1952 -1.636723 1953 -1.464414 1954 -1.708136 1955 -1.337386 1956 -1.590002 1957 -1.800441 1958 -1.598994 1959 -1.676095 1960 -1.334162 1961 -1.598346 1962 -1.562055 1963 -1.945644 1964 -1.841575 1965 -2.079495 1966 -1.62208 1967 -1.706617 1968 -1.65207 1969 -1.569866 1970 -1.714203 1971 -1.634294 1972 -1.568548 1973 -1.713772 1974 -1.690465 1975 -1.546954 1976 -1.496509 1977 -1.705035 1978 -1.475668 1979 -1.501714 1980 -1.560916 1981 -1.545887 1982 -1.335182 1983 -1.626179 1984 -1.591558 1985 -1.595807 1986 -1.438118 1987 -1.328208 1988 -1.300395 1989 -1.220399 1990 -1.135246 1991 -1.284963 1992 -1.460879 1993 -1.619859 1994 -1.456827 1995 -1.138045 1996 -1.393308 1997 -1.131267 1998 -1.101892 1999 -0.9815582 2000 -0.673439 2001 -0.8114622 2002 -1.002682 2003 -0.7455379 2004 -0.9445452 2005 -1.064049