year  wnpmidx-jja
1948   1.642
1949  -0.543
1950   0.428
1951   0.143
1952   0.968
1953   0.342
1954  -1.661
1955  -1.601
1956  -0.701
1957  -0.361
1958  -0.311
1959  -1.300
1960   0.337
1961   1.093
1962   0.165
1963   0.817
1964  -0.588
1965   0.470
1966  -1.133
1967   1.191
1968  -0.174
1969  -0.557
1970  -0.245
1971  -0.244
1972   1.084
1973  -0.234
1974   0.122
1975  -0.198
1976   0.355
1977  -0.579
1978   1.130
1979   0.366
1980  -0.468
1981   1.159
1982   0.878
1983  -1.487
1984   0.898
1985   1.320
1986   1.422
1987  -0.425
1988  -1.863
1989   0.008
1990   1.448
1991   0.148
1992  -0.043
1993  -0.859
1994   1.190
1995  -1.367
1996  -1.548
1997   0.737
1998  -2.909
1999  -0.058
2000   0.132
2001   1.572
2002   0.975
2003  -0.695
2004   1.523
2005   0.003
2006   0.617
2007  -1.250
2008  -1.279