You sure about "progressively gone down"? I think that'd be hard to maintain, by the usual measures; not even for Indonesia pre-1998.
What seems to be the case, however, is that crises intervene, with the outcome of keeping them in line. Not suggesting a conspiracy, but an observation of the outcome of crises. Now supported by a couple of IMF (or is it WB?) working papers showing that the "recovery" is not really a recovery in the sense of a return to the trend line, but a "recovery" to a lowered trend line.
kj