The Washington Post reports a recent study from the National Survey on Drug Use and Health (NSDUH), concluded approximately 13 percent of Rhode Island residents over the age of 12 smoked marijuana in the past month.
Although consumption of marijuana drops greatly with age, Alaska is the state with the highest rate of adults over the age of 26 who regularly smoke.
“Only 5 percent of Americans in that age group smoke marijuana regularly. Alaska’s 26-and-over crowd is the most likely to regularly use marijuana, at 11.18 percent. To put it another way, Alaska’s adults are more likely to use marijuana than Utah’s college-age crowd. Both Oregon and Alaska have marijuana legalization measures on their ballots this fall. Not coincidentally, these are the two states with the highest rates of 26-and-over marijuana use.”
Source and detailed chart here