About 9% of US adults between the ages of 50 and 64 have used marijuana at least once during the survey year, while 3% of those over 65 have done so, new research finds.

For middle-age adults, the percentage of cannabis users has doubled over nearly a decade, according to the study, published Thursday in the journal Drug and Alcohol Dependence. Older adults have seen a seven-fold increase in that period.

Baby boomers have more experience with marijuana than previous generations, the study authors said. More than half (almost 55%) of middle-age adults have used marijuana at some point in their lives, while over a fifth (about 22%) of older adults have done so.

See the original article at CNN