I think there are still places that are within the 20 year window of the abolishment of lead, but they'd be disappearing pretty fast. Since we can probably assu

I think there are still places that are within the 20 year window of the abolishment of lead, but they'd be disappearing pretty fast. Since we can probably assume that there is no place in the world that will or would indefinitely allow the use of lead in gasoline (and if they would, obtaining meaningful crime reporting numbers out of them might be tricky), comparing the time lag across jurisdictions is the best control we'll probably get.