Opponents of marijuana legalization often cite the "skyrocketing" number of people seeking treatment for marijuana addiction in their arguments. Project SAM, the nation's leading anti-legalization group, notes with some alarm that "data from the National Institute on Drug Abuse found that in 1993, marijuana comprised approximately 8 percent of ALL treatment admissions, but by 2009 that number had increased to 18 percent." But new data out this month from the Department of Health and Human Services provides some important context behind those numbers.