Table 1. Number of participants per age per sex.

Age (y)	Frequency
	Female	Male	Total
14	11	11	22
15	11	10	21
16	10	10	20
17	11	10	21
18	13	10	23
19	15	14	29
20	20	10	30
21	14	11	25
22	12	12	24
23	12	10	22
24	11	11	22
25	13	12	25
26	10	15	25
Total	163	146	309