# year value 1900 -1.575419 1901 -1.577296 1902 -1.661445 1903 -1.920373 1904 -2.024073 1905 -1.700139 1906 -1.71757 1907 -1.821064 1908 -1.523695 1909 -1.784602 1910 -1.726062 1911 -1.694758 1912 -1.672282 1913 -1.912839 1914 -1.872264 1915 -1.622916 1916 -1.622766 1917 -1.510175 1918 -1.52195 1919 -1.576429 1920 -1.509922 1921 -1.512257 1922 -1.495378 1923 -1.53157 1924 -1.500822 1925 -1.641506 1926 -1.481149 1927 -1.573799 1928 -1.422628 1929 -1.559802 1930 -1.602382 1931 -1.609546 1932 -1.430707 1933 -1.590466 1934 -1.501825 1935 -1.588227 1936 -1.5091 1937 -1.36244 1938 -1.59405 1939 -1.438144 1940 -1.529173 1941 -1.359993 1942 -1.442343 1943 -1.685888 1944 -1.479787 1945 -1.471427 1946 -1.515164 1947 -1.503659 1948 -1.350151 1949 -1.423058 1950 -1.325254 1951 -1.372394 1952 -1.436319 1953 -1.381486 1954 -1.47676 1955 -1.329111 1956 -1.47086 1957 -1.3901 1958 -1.407722 1959 -1.481195 1960 -1.337377 1961 -1.482747 1962 -1.482086 1963 -1.55769 1964 -1.585202 1965 -1.630288 1966 -1.620313 1967 -1.606704 1968 -1.621235 1969 -1.705056 1970 -1.67241 1971 -1.55562 1972 -1.41308 1973 -1.495636 1974 -1.517996 1975 -1.466488 1976 -1.438278 1977 -1.402434 1978 -1.261079 1979 -1.342187 1980 -1.277965 1981 -1.1704 1982 -1.177918 1983 -1.567942 1984 -1.304883 1985 -1.384165 1986 -1.29861 1987 -1.199664 1988 -1.164552 1989 -0.9626743 1990 -0.9291152 1991 -0.9586719 1992 -1.407749 1993 -1.299425 1994 -1.109016 1995 -1.05466 1996 -1.025927 1997 -0.8734968 1998 -0.8482232 1999 -0.8423563 2000 -0.7131856 2001 -0.6199116 2002 -0.7554455 2003 -0.6464928 2004 -0.5893896 2005 -0.5523372