year  wymidx-jja
1948   2.162
1949   0.425
1950   0.996
1951  -0.811
1952   0.603
1953  -0.271
1954   1.469
1955   0.832
1956   0.000
1957  -0.492
1958   0.515
1959  -0.232
1960   1.065
1961   0.987
1962  -0.085
1963  -0.958
1964   0.932
1965   0.389
1966  -0.453
1967   0.838
1968   0.434
1969   0.403
1970   1.602
1971   0.579
1972  -2.339
1973  -0.280
1974  -0.684
1975   0.435
1976  -0.758
1977  -0.108
1978   0.952
1979  -1.883
1980   0.890
1981   1.159
1982   0.386
1983  -1.318
1984   0.792
1985   2.200
1986   0.348
1987  -1.549
1988   0.312
1989  -0.529
1990   0.920
1991   0.262
1992  -1.444
1993  -0.450
1994   1.231
1995  -0.535
1996  -1.366
1997  -2.196
1998  -0.460
1999   0.504
2000   0.019
2001   0.347
2002  -0.705
2003  -0.960
2004  -0.055
2005  -0.243
2006  -0.985
2007  -1.560
2008  -1.278