The data showing the dangers of marijuana has been around for many years,and it keeps getting more depressing regardless of what NRML the Libertarians, and Soros say.
http://www.drugabuse.gov/infofacts/marijuana.html
Your data warns of potential harm. It shows no real evidence of real harm as in documented cases.
Do a search on "Marijuana Deaths" and see what you can find.
The big lie is easy to swallow. A simple lie, easy for even the stupid to understand. Marijuana is dangerous is the lie.