year  wymidx-aug
1948   1.736
1949   0.412
1950   1.152
1951  -0.420
1952   0.331
1953  -0.248
1954   1.630
1955   0.341
1956   0.401
1957  -0.026
1958  -0.075
1959   1.121
1960   1.946
1961   1.532
1962  -0.722
1963  -0.935
1964   2.285
1965  -1.601
1966  -0.513
1967   1.621
1968   0.444
1969  -1.463
1970   0.796
1971  -0.210
1972  -1.817
1973  -0.086
1974  -0.404
1975   0.551
1976  -1.206
1977   0.067
1978   1.189
1979  -1.699
1980   1.353
1981   1.075
1982   1.320
1983  -0.094
1984   0.567
1985   1.422
1986  -0.584
1987  -1.608
1988  -0.225
1989  -0.811
1990   0.134
1991   1.041
1992   0.054
1993   0.303
1994   0.186
1995  -0.849
1996  -1.080
1997  -1.124
1998  -0.868
1999  -0.620
2000  -0.043
2001  -0.315
2002  -1.021
2003  -0.689
2004  -0.233
2005  -0.564
2006  -1.297
2007  -0.609
2008  -0.953