|  | boys | % | girls | % | Total | % |
---|---|---|---|---|---|---|---|
13 yr | 1987 | 480 | 64 | 451 | 60 | 931 | 62 |
 | 1994 | 617 | 82 | 667 | 89 | 1284 | 86 |
 | 2003 | 488 | 65 | 538 | 72 | 1026 | 68 |
15 yr | 1987 | 440 | 59 | 404 | 54 | 844 | 56 |
 | 1994 | 606 | 81 | 661 | 88 | 1267 | 84 |
 | 2003 | 456 | 61 | 512 | 68 | 968 | 65 |
17 yr | 1987 | 654 | 87 | 604 | 81 | 1258 | 84 |
 | 1994 | 575 | 77 | 611 | 81 | 1186 | 79 |
 | 2003 | 454 | 61 | 526 | 70 | 980 | 65 |
Total | 1987 | 1574 | 70 | 1459 | 65 | 3033 | 67 |
 | 1994 | 1798 | 80 | 1939 | 86 | 3737 | 83 |
 | 2003 | 1398 | 62 | 1576 | 70 | 2974 | 66 |