year  ismidx-jul
1948  -0.285
1949  -2.023
1950   0.628
1951  -0.796
1952   0.672
1953   0.265
1954   0.315
1955  -2.068
1956   1.207
1957   0.394
1958   1.028
1959   1.715
1960  -0.468
1961   1.329
1962   0.939
1963  -0.636
1964  -0.636
1965  -0.465
1966   0.242
1967   1.105
1968   0.901
1969   1.098
1970  -0.857
1971  -0.091
1972  -1.181
1973   1.295
1974  -0.740
1975  -1.342
1976   0.474
1977   0.748
1978   0.247
1979  -0.446
1980   0.473
1981  -0.356
1982  -0.756
1983   0.117
1984  -0.336
1985  -1.096
1986  -0.493
1987  -2.948
1988   0.602
1989  -0.088
1990  -1.345
1991   1.147
1992   0.267
1993   0.866
1994   1.339
1995   0.585
1996   0.512
1997   0.708
1998  -0.042
1999  -0.199
2000   0.081
2001  -0.119
2002  -2.726
2003   1.700
2004  -0.301
2005   0.908
2006   0.380
2007  -0.802
2008  -0.645