year  wnpmidx-aug
1948   1.492
1949  -0.652
1950  -0.899
1951   0.809
1952   0.871
1953   1.142
1954  -0.209
1955  -1.763
1956  -0.353
1957   0.226
1958  -1.477
1959  -0.283
1960   0.604
1961   0.818
1962  -0.566
1963  -0.659
1964   0.184
1965  -1.281
1966  -1.127
1967   1.424
1968   0.748
1969  -1.702
1970  -0.025
1971  -1.764
1972   0.091
1973   0.466
1974   0.307
1975   0.381
1976  -0.234
1977  -0.561
1978   1.595
1979   0.364
1980  -0.709
1981   0.623
1982   0.255
1983  -0.656
1984   1.776
1985   0.670
1986   1.765
1987  -1.062
1988  -2.684
1989  -0.007
1990   0.806
1991   0.465
1992   0.727
1993  -0.038
1994   0.183
1995  -0.745
1996  -1.469
1997   0.823
1998  -2.049
1999  -1.078
2000  -0.025
2001   1.433
2002   0.579
2003   0.083
2004   1.318
2005   0.081
2006   0.780
2007   0.187