Expanding on an point by grimtrigger, is this related to damage per user, or overall damage? If governments no longer controlled heroin, and the number of users spiked to be the same as the number of users of alcohol would the graphs change.

I suspect that because of dependency, strong drugs would still lead to increases in crime, since they would still cost something, and their users would still not be in a position to productively earn to feed their habit especially as they got deeper into the addiction.