Leaving aside my personal feeling about the drug war, those statistics are not fine grained enough.
They should show percentages by offense. Ie what are the pot smoking percentages, then what are the incarceration rates for possession without intent to distribute?
What are the rates of admitted distributors, and what are the rates of incarceration for distributing?
Don’t do the stuff and there are two benefits.
#1. You help stop destabilizing Mexico and empowering drug cartels.
#2. There is a more stabil and employable population of people without the drugs.