Reams draws a prepared sample of medical marijuana before injecting it into a gas chromatograph at OregonGreen Lab on Friday, July 29, 2011. Medical marijuana has been growing in popularity statewide since becoming legal in 1999. The number of residents registered as patients, caregivers and growers this year hit 120,945, nearly four times the number five years ago. Reams decided to tap into the rising popularity of using marijuana to treat medical conditions by starting a lab.