| Gender | Year | |||||||||
| 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | |
| Total | 1,570 | 1,861 | 2,237 | 2,586 | 3,058 | 3,311 | 3,520 | 3,685 | 3,717 | 3,836 |
| Female | 884 | 1,066 | 1,302 | 1,486 | 1,809 | 1,947 | 2,066 | 2,109 | 2,158 | 2,217 |
| Male | 686 | 795 | 935 | 1,100 | 1,249 | 1,364 | 1,454 | 1,576 | 1,559 | 1,619 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 56.3% | 57.3% | 58.2% | 57.5% | 59.2% | 58.8% | 58.7% | 57.2% | 58.1% | 57.8% |
| Male | 43.7% | 42.7% | 41.8% | 42.5% | 40.8% | 41.2% | 41.3% | 42.8% | 41.9% | 42.2% |