Table 1.

Age distribution of the subjects

Age (years)	N	%
3	215	6.8
4	213	6.8
5	178	5.7
6	210	6.7
7	214	6.8
8	210	6.7
9	210	6.7
10	210	6.7
11	212	6.7
12	212	6.7
13	215	6.8
14	216	6.9
15	216	6.9
16	213	6.8
17	203	6.5
Total	3147	100.0