| Gender | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | |
| Total | 778 | 874 | 1,029 | 1,254 | 1,421 | 1,482 | 1,654 | 2,059 | 1,791 | 1,212 |
| Female | 476 | 545 | 639 | 780 | 870 | 890 | 1,013 | 1,229 | 1,066 | 720 |
| Male | 302 | 329 | 390 | 474 | 551 | 592 | 641 | 830 | 725 | 492 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 61.2% | 62.4% | 62.1% | 62.2% | 61.2% | 60.1% | 61.2% | 59.7% | 59.5% | 59.4% |
| Male | 38.8% | 37.6% | 37.9% | 37.8% | 38.8% | 39.9% | 38.8% | 40.3% | 40.5% | 40.6% |