U.S. medical marijuana law effects on teenage marijuana usage by state 1995-2015
This graph shows the change of teenage marijuana use in U.S. states with medical marijuana laws according to surveys between 1995 and 2015. It was found that in 13 states with medical marijuana laws there were overall decreases in teenage marijuana use. There were five states that reported higher teenage marijuana use after medical marijuana laws were passed, but none of these were statistically significant changes.