Marijuana arrests/past-month use:
1994 - 481,000/10,000,000
2004 - 771,000/14,500,000
Rio Linda summary for 1994-2004: Arrests up by almost 60%, past-month use up over 40%!
If you want to nitpick, fine -- then let's go ahead and compare the 1996 number of 641,000 to the most recent figure, 771,000 -- that's a 20% increase. Drug use went up 40% in the same period.
We're arresting fewer people, and that's part of the reason for the increase. It's not THE reason, it's not even the main reason. It's one factor.