year  wymidx-jja
1948   2.153
1949   0.405
1950   0.980
1951  -0.837
1952   0.585
1953  -0.294
1954   1.456
1955   0.815
1956  -0.022
1957  -0.516
1958   0.496
1959  -0.255
1960   1.050
1961   0.971
1962  -0.107
1963  -0.985
1964   0.916
1965   0.369
1966  -0.477
1967   0.822
1968   0.415
1969   0.384
1970   1.590
1971   0.561
1972  -2.374
1973  -0.303
1974  -0.710
1975   0.416
1976  -0.783
1977  -0.130
1978   0.936
1979  -1.915
1980   0.873
1981   1.144
1982   0.367
1983  -1.347
1984   0.775
1985   2.191
1986   0.328
1987  -1.579
1988   0.292
1989  -0.553
1990   0.904
1991   0.242
1992  -1.474
1993  -0.474
1994   1.217
1995  -0.560
1996  -1.395
1997  -2.230
1998  -0.484
1999   0.485
2000  -0.002
2001   0.328
2002  -0.731
2003  -0.987
2004  -0.077
2005  -0.266
2006  -1.012
2007  -1.591