Also, due to politization of the topic, part of the data is distorted to help sell the war on drugs, which had a much more destructive effect overall, aside from failing in its main goal.
We don't know how much higher the drug usage would be if all drugs were legalized.
> or any country where the criminalization is in full force.
That's an extremely general statement which is almost certainly wrong.
Given what we know about the prohibition era and insights about the success in the fight against drug abuse, it's a pretty safe bet.
> That's an extremely general statement which is almost certainly wrong.
Is it? Even the most successful countries, like Japan and Singapore, seem to have low drug usage despite of criminalization, not because of. Even then, the data is murky, because criminalization of usage incentivizes low self-reporting.