Cannabis by the numbers

Currently, 65% of cannabis sales stem from medical marijuana.

Medical now legalized to various degrees in 29 states with legislation pending in 15 more.

Recreational or adult use of cannabis (legal in nine states but only in effect in five currently) is fast growing.

Recreational usually outpaces medical sales by a 15:1 margin in the first few years after legalization.

Nevada, the latest state to legalize recreational use, expects to see 20:1 or higher sales of recreational cannabis boosted by tourism.

Experts believe that by 2021 every state in the U.S. will have legalized cannabis for medical use

Sales of medical marijuana will top $15 billion at that point.

An additional six states are expected to permit recreational cannabis sales in the next two years.