Health and Fitness Prevalence of Marijuana Use Among U.S. Adults Doubles Over Past Decade by Press on October 22, 2015 Press Author More in Health and Fitness: On Hantavirus, Park Forest Officials Urge Caution May 18, 2026 Rep. Kelly Condemns FDA Approval of Flavored E-Cigarettes May 6, 2026 Park Forest Aligns With Illinois Guidance on Childhood Vaccines Amid Federal Changes January 11, 2026 Surveys show 9.5 percent of Americans use marijuana; 30 percent of users meet criteria for a disorder