Pretty much any functional state outside North America. Even Latin American countries that produce hard drugs, have use under contol better than Canada and the US.

I don't know, plenty of countries have successful strict drug laws. Drugs just seem to be part of North American culture. A lot of popular NA music is about drugs, they find kids hopped up on drugs after a vist to the dentist to be funny, etc. It's not enough to have intermittent efforts to stump out drug use, which is what you're referring to, there needs to be a sustained effort, which politicians and law enforcement are not capable of carrying because they don't see drug use as a big deal, because it's part of the culture.

It's like trying to fight littering ina developing country, it's difficult because people have a high level of tolerance to garbage in the street. They only care once garbage start stacking up high blocking streets and sidewalks and things start to smell really bad, just like how North Amricans only care about hard drug use when people start dying in droves.

In conjencture with assisted suicide laws, this should greatly reduce Canada's mental health budget. Feeling sad? Take some drugs. Stuck in a downward spiral of drug use? Kill yourself.