Table 1.

Sample size by subgroups.

Age	Total		Males		Females
	n	%	n	%	n	%
10 years	2430	3.6	1224	3.5	1206	3.7
11 years	10,933	16.2	5743	16.5	5190	16.0
12 years	16,244	24.1	8745	25.1	7499	23.2
13 years	15,331	22.8	7943	22.8	7388	22.8
14 years	8871	13.2	4769	13.7	4102	12.7
15 years	4076	6.1	1962	5.6	2114	6.5
16 years	6379	9.5	3014	8.6	3365	10.4
17 years	3017	4.5	1509	4.3	1508	4.7