Table 1.

Distribution on prospectively determined age at initiation of alcoho1 use (among ever drinkers)

Age in years	Freq.	%	Cumul. freq.	Cumul. %
8	2	1.0	2	1.0
9	4	1.9	6	2.9
10	2	1.0	8	3.8
11	14	6.7	22	10.5
12	19	9.1	41	19.6
13	31	14.8	72	34.4
14	40	19.1	112	53.6
15	47	22.5	159	76.1
16	31	14.8	190	90.9
17	16	7.7	206	98.6
18	3	1.4	209	100.0
Total	209	100.0

Notes: Percentages of the sample who initiated drinking at ages 17 and 18 are low because many of the adolescents had not yet reached these ages. Freq. = frequency; cumul. = cumulative.