Trends in Drug Use Initiation Among Those Ages 12 and Older

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Overview of Drug Use Initiation	Ratios of Use vs Alcohol	Ratios of Use vs Marijuana

Comparison Ratios of Use vs Alcohol and Marijuana
Overall	Age 12 to 17	Age 18 or Older

Trends Among Other Demographic Groups
12th Grade Students	College Students	Ages 19 to 28

Sources: Monitoring the Future
National Survey on Drug Use and Health