# year value 1900 1.112224 1901 1.011886 1902 1.016607 1903 0.8305249 1904 0.8230904 1905 0.9350563 1906 0.9294499 1907 0.9842442 1908 0.9814413 1909 1.039573 1910 1.012368 1911 1.081626 1912 1.077028 1913 1.05929 1914 1.031599 1915 1.076269 1916 1.111243 1917 1.141225 1918 1.071486 1919 1.067378 1920 1.121612 1921 1.207983 1922 1.134856 1923 1.177872 1924 1.165049 1925 1.186275 1926 1.111854 1927 1.194441 1928 1.200525 1929 1.125393 1930 1.1773 1931 1.128774 1932 1.174895 1933 1.150376 1934 1.047334 1935 1.155465 1936 1.229137 1937 1.278068 1938 1.246173 1939 1.258618 1940 1.233802 1941 1.199149 1942 1.289301 1943 1.255027 1944 1.292431 1945 1.294111 1946 1.222722 1947 1.222417 1948 1.27704 1949 1.359221 1950 1.250911 1951 1.286796 1952 1.280618 1953 1.227356 1954 1.301759 1955 1.23396 1956 1.323022 1957 1.357767 1958 1.277911 1959 1.296151 1960 1.327681 1961 1.351992 1962 1.295386 1963 1.264697 1964 0.9623861 1965 1.065866 1966 1.136651 1967 1.117047 1968 1.167497 1969 1.170019 1970 1.241976 1971 1.297615 1972 1.301941 1973 1.345346 1974 1.299355 1975 1.325207 1976 1.342583 1977 1.334787 1978 1.312048 1979 1.409476 1980 1.494535 1981 1.534108 1982 1.471273 1983 1.262151 1984 1.407072 1985 1.412685 1986 1.372531 1987 1.491322 1988 1.614562 1989 1.530141 1990 1.657002 1991 1.681131 1992 1.316443 1993 1.432668 1994 1.389533 1995 1.43784 1996 1.624478 1997 1.688746 1998 1.746156 1999 1.725477 2000 1.754473 2001 1.796763 2002 1.955374 2003 1.860871 2004 1.841603 2005 1.942467