A coworker of mine brought up Colombia's legalization of possession of small amounts of, apparently, all drugs for personal use. I hadn't heard about it, but speculated that it was to reduce the power and funding of the cartels.
So, I look it up, and apparently it happened (according to what I've been able to discern) in the mid-90s, for the exact reason I guessed, go figure. Don't know what it's like now, but the funny thing is my coworker tried blaming poverty levels on the legal drugs. She's one of those "protect the children from drugs" types, and didn't get that drug use isn't the only cause of being "poor."
But I digress. Add Colombia to the mix, pending someone else's knowledge or less-lazy-than-me research, I guess.