Reported Past Year Subtance Dependence by Age, 1999

The graph reflects past year substance dependence by ages 12-17; 18-25; and 26 and older for alcohol, marijuana, cocaine, hallucinogens, prescription drugs, heroin, and alcohol and drugs together. The vertical axis runs from zero to ten percent. The following are visual approximations of the bar graph:

For alcohol use, those 12-17 years old report 3.5%; 9.25% for ages 18-25; and 2.75% for those 26 years or older; for marijuana use, those 12-17 years old report 2.6%; 3.5% for those 18-25; and 0.50% for those 26 years or older; for cocaine use, those 12-17 report 0.25%; 0.85% for those 18-25; and 0.30% for those 26 years or older; for hallucinogen use, those 12-17 report 0.30%; 0.60% for those 18-25; and 0% for those 26 years or older; for prescription drugs, those 12-17 report 0.65%; 0.66% for those 18-25; and 0.25% for those 26 years or older; for heroin use, those 12-17 report 0.10%; 0.20% for those 18-25; and 0.20% for those 26 years or older; for those using alcohol and drugs together, those 12-17 report 10.30%; 2.0% for those 18-25; and 0.50 for those 26 years or older.

[Source: Substance Abuse and Mental Health Services Administration. (1999a). Summary of Findings From the 1999 National Household Survey on Drug Abuse. Rockville, MD: Department of Health and Human Services.]