I don't believe that data at all. When I graduated high school in 1987 and entered the Army I would say only 15% or less of people I've known had NOT "tried marijuana". I smoked twice in my life almost 30 years ago and am not a user but would fall into the 51% they claim have tried it. That doesn't mean I would support legalization. Maybe we should start a poll to see who has "tried" it not meaning who smokes regularly. I bet a very high % have at some point in their life.
Mc, did you poop the poll idea or the suggestion that most people have lit up at one point in their life?