| Gender | Year | |||||||||
| 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | |
| Total | 2,885 | 3,413 | 3,635 | 3,810 | 4,066 | 3,933 | 3,957 | 3,905 | 3,760 | 3,519 |
| Female | 539 | 701 | 733 | 835 | 894 | 908 | 899 | 867 | 864 | 834 |
| Male | 2,346 | 2,712 | 2,902 | 2,975 | 3,172 | 3,025 | 3,058 | 3,038 | 2,896 | 2,685 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 18.7% | 20.5% | 20.2% | 21.9% | 22.0% | 23.1% | 22.7% | 22.2% | 23.0% | 23.7% |
| Male | 81.3% | 79.5% | 79.8% | 78.1% | 78.0% | 76.9% | 77.3% | 77.8% | 77.0% | 76.3% |