Sure it does. It says that there's around 450,000 in prison on drug offenses out of 2,019,234 -- that's 22%.
Your 70-80% drug-related offenses include those who possessed drugs or were high on drugs when they committed the crime they were charged with. They'd be arrested even if drugs were legal, so I don't see how we can count them.
"The fact is, more than 70% of prisoners are locked up for non-violent crimes, most for drug crimes or low level property crimes."
Well, if 22% are drug crimes, then I guess the other 48% are for property crimes. Your point?
"Drugs aren't creating criminals...You are!"
People make choices. Criminals made the wrong choice. I don't see how that's my fault.