Table 3.

Distribution and prevalence of registered medical marijuana (MMJ) participants by age group in eight US states.

State (As of)/ Age Group	Proportion (%)	Particpants Per 1000a	State (As of)/ Age Group	Proportion (%)	Participants Per 1000a	State (As of)/ Age Group	Proportion (%)	Patients Per 1000a
Alaska (June 2015)	Montana (May 2015)				Rhode Island (June 2015)
Under 18	<1.0	<0.1	Under 18	<1.0	<0.1	21 & Under	2.2	0.9
18–24	4.1	0.9	18–20	1.9	5.4	22–29	13.0	12.9
25–29	6.2	1.7	21–30	15.6	13.8	30–39	20.8	19.3
30–39	17.6	2.9	31–40	20.1	19.9	40–49	19.9	16.1
40–49	18.2	3.3	41–50	17.0	16.5	50–59	24.1	17.6
50–59	28.5	4.4	51–60	25.9	19.7	60–69	16.4	16.4
60–69	19.4	4.3	61–70	16.6	16.1	70 & Over	3.6	3.7
70 & Over	3.0	1.2	71 & Over	2.9	3.4
Arizona (April 2015)	Nevada (Jan. 2014)				Vermont (Jan. 2015)
Under 18	<1.0	<0.1	Under 18	<1.0	<0.1	Under 18	<1.0	<1.0
18–30	23.9	14.0	18–20	<1.0	0.5	18–24	1.4	<1.0
31–40	20.0	16.5	21–24	3.8	1.2	25–34	8.6	2.0
41–50	15.9	13.4	25–34	18.9	2.4	35–44	16.4	3.7
51–60	20.1	16.8	35–44	18.9	2.4	45–54	25.2	4.5
61–70	15.9	15.7	45–54	21.2	2.7	55–64	31.3	5.3
71 & Over	4.1	4.3	55–64	23.1	3.3	65 & Over	16.5	2.5
			65 & Over	13.0	1.7
Colorado (April 2015)	Oregon (April 2015)
Under 18	<1.0	<1.0	Under 18	<1.0	<1.0
18–20	5.0	28.7	18–20	1.3	6.5
21–30	23.0	34.9	21–24	4.3	14.0
31–40	20.7	32.9	25–29	8.1	22.0
41–50	16.1	26.1	30–39	20.7	28.0
51–60	19.0	30.4	40–49	17.2	24.4
61–70	13.2	30.0	50–59	23.3	30.5
71 & Over	2.4	7.4	60–69	20.3	30.9
			70 & Over	5.1	9.0

^aDenominator of prevalence proportion used age-specific state population based on US Census estimates for 2014.