Jacob Sullum cites the Self-Refuting Drug Warriors‘ own numbers for the percentage of people who became “dependent” on various drugs within two years of trying them:
Inhalants: 0.9%
Tranquilizers (nonmedical use): 1.2%
Psychedelics: 1.9%
Sedatives (nonmedical use): 2.4%
Painkillers (nonmedical use): 3.1%
Alcohol: 3.2%
Cocaine Powder: 3.7%
Stimulants (nonmedical use): 4.7%
Marijuana: 5.8%
Crack Cocaine: 9.2%
Heroin: 13.4%