American adults are smoking more pot, but increased cannabis use does not appear to be due to wider availability of legal marijuana, a new study shows. Pot consumption among women almost doubled between 1984 and 2015, from 5.5 percent of adults to 10.6 percent; meanwhile, 14.7 percent more men are toking up since 2000, according to the report from the Public Health Institute. But researchers cautioned against assuming that relaxed laws governing recreational and medicinal pot are driving the trend.