I don't have enough information to form an opinion on the policies, but comparing "Percentage of Prison Population Convicted for Drug Offences[sic]" is not usef

I don't have enough information to form an opinion on the policies, but comparing "Percentage of Prison Population Convicted for Drug Offences[sic]" is not useful at all. You need to look at things like substance abuse disorder rates among the general population, hospitalizations due to overdoses, and rates of other crimes directly linked to substance abuse before you can tell if it's "working". The question of wether or not it's the right policy is separate from wether or not it's working but this article seems to be focusing on the former, in spite of the title.