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ADDICTION: ABOUT 9% OF USERS BECOME DEPENDENT, <br />1 IN 6 WHO START USE IN ADOLESCENCE, <br />25-50% OF DAILY USERS CD <br />Estimated Prevalence of Dependence Among Users <br />35 32 <br />30 <br />4-0 25 23 <br />2015 17 <br />15 11 <br />PLO 10 9 8 <br />5 5 <br />0 ■ <br />* Nonmedical Use <br />Source: Anthony Jc et al., 1994 <br />