Table 1.

Prevalence and population estimates of past-year substance use and past-year substance dependence among users: U.S. adults 18 years of age and older

Substance	Prevalence (%)of past-year use	Number of past-year users	% of past-year users with past-year dependence	Number with past-year dependence
Alcohol	65.44	136,035,000	5.82	7,911,600
Tobacco	27.66	57,503,000	46.13	26,525,000
Cannabis	4.07	8,468,000	7.96	673,900
Opiates	1.81	3,756,000	6.30	236,500
Sedatives	1.24	2,583,000	5.42	139,900
Tranquilizers	0.93	1,940,000	5.04	97,700
Hallucinogens	0.57	1,192,000	2.67	31,800
Cocaine	0.56	1,169,000	23.91	279,500
Amphetamines	0.49	1,019,000	14.34	146,000
Solvents/inhalants	0.11	231,000	1.04	2,400
Heroin	0.03	64,000	26.96	17,300