| Gender | Year | |||||||||
| 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | |
| Total | 2,798 | 2,891 | 3,419 | 3,640 | 3,817 | 4,079 | 3,951 | 3,978 | 3,934 | 3,803 |
| Female | 508 | 540 | 702 | 734 | 837 | 898 | 913 | 905 | 873 | 872 |
| Male | 2,290 | 2,351 | 2,717 | 2,906 | 2,980 | 3,181 | 3,038 | 3,073 | 3,061 | 2,931 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 18.2% | 18.7% | 20.5% | 20.2% | 21.9% | 22.0% | 23.1% | 22.8% | 22.2% | 22.9% |
| Male | 81.8% | 81.3% | 79.5% | 79.8% | 78.1% | 78.0% | 76.9% | 77.2% | 77.8% | 77.1% |