It's worth noting that cannabis was the least addictive of the substances analyzed in this study, almost a third as likely as alchohol:

The cumulative probability estimate of transition to dependence was 67.5% for nicotine users, 22.7% for alcohol users, 20.9% for cocaine users, and 8.9% for cannabis users.

CDC rounding 8.9% up to 10% seems a bit suspicious to me