| Gender | Year | |||||||||
| 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | |
| Total | 855 | 989 | 1,148 | 1,358 | 1,496 | 1,708 | 2,052 | 2,370 | 2,378 | 2,425 |
| Female | 371 | 449 | 492 | 612 | 651 | 716 | 896 | 1,022 | 1,033 | 1,089 |
| Male | 484 | 540 | 656 | 746 | 845 | 992 | 1,156 | 1,348 | 1,345 | 1,336 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 43.4% | 45.4% | 42.9% | 45.1% | 43.5% | 41.9% | 43.7% | 43.1% | 43.4% | 44.9% |
| Male | 56.6% | 54.6% | 57.1% | 54.9% | 56.5% | 58.1% | 56.3% | 56.9% | 56.6% | 55.1% |