year  wymidx-aug
1948   1.719
1949   0.396
1950   1.136
1951  -0.435
1952   0.315
1953  -0.263
1954   1.613
1955   0.325
1956   0.385
1957  -0.042
1958  -0.091
1959   1.104
1960   1.929
1961   1.515
1962  -0.737
1963  -0.950
1964   2.268
1965  -1.616
1966  -0.529
1967   1.604
1968   0.428
1969  -1.478
1970   0.780
1971  -0.226
1972  -1.832
1973  -0.102
1974  -0.420
1975   0.534
1976  -1.221
1977   0.051
1978   1.172
1979  -1.714
1980   1.336
1981   1.058
1982   1.304
1983  -0.110
1984   0.551
1985   1.405
1986  -0.599
1987  -1.623
1988  -0.240
1989  -0.826
1990   0.118
1991   1.025
1992   0.038
1993   0.287
1994   0.170
1995  -0.865
1996  -1.095
1997  -1.140
1998  -0.883
1999  -0.635
2000  -0.059
2001  -0.331
2002  -1.036
2003  -0.704
2004  -0.249
2005  -0.580
2006  -1.312
2007  -0.624