1998 National Household Survey on Drug Abuse

Table 28. Percentages Reporting Lifetime, Past Year, and Past Month Use of Marijuana, by Detailed Age Categories:  1997 and 1998  

	TIME PERIOD
	Lifetime		Past Year		Past Month
Age Group	1997	1998	1997	1998	1997	1998
Total	32.9	33.0	9.0	8.6	5.1	5.0
12-17 Years Old	18.9a	17.0	15.8	14.1	9.4	8.3
12-13	4.4	3.4	4.0	3.0	2.5	1.7
14-15	18.6	16.9	15.7	14.6	9.2	8.8
16-17	33.3	31.5	27.4	25.3	16.3	14.7
18-25 Years Old	41.5	44.6	22.3	24.1	12.8	13.8
18-20	40.0	44.0	26.9	30.8	15.4	18.0
21-25	42.4	45.0	19.3	19.4	11.1	10.9
26-34 Years Old	47.9	47.9	11.2	9.7	6.0	5.5
26-29	44.9	45.8	13.6a	10.3	6.3	6.1
30-34	50.2	49.6	9.4	9.3	5.7	4.9
35 Years and Older	29.4	29.4	4.4	4.1	2.6	2.5
35-39	55.9	51.2	11.5	9.5	6.9	6.2
40-44	50.2	53.8	7.5	6.9	3.7	4.4
45-49	42.6	44.4	4.9	5.8	3.4	3.4
>50	11.2	11.5	1.0	1.0	0.6	0.6

*Low precision; no estimate reported.

^aDifference between 1997 and 1998 is statistically significant at the .05 level.

^bDifference between 1997 and 1998 is statistically significant at the .01 level.

Source: SAMHSA, Office of Applied Studies, National Household Survey on Drug Abuse, 1997 and 1998.

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SAMHSA, an agency in the Department of Health and Human Services, is the Federal Government's lead agency for improving the quality and availability of substance abuse prevention, addiction treatment, and mental health services in the United States.