| Gender | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | |
| Total | 38 | 111 | 203 | 284 | 382 | 548 | 640 | 700 | 686 | 630 |
| Female | 11 | 51 | 87 | 126 | 163 | 250 | 286 | 297 | 291 | 278 |
| Male | 27 | 60 | 116 | 158 | 219 | 298 | 354 | 403 | 395 | 352 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 28.9% | 45.9% | 42.9% | 44.4% | 42.7% | 45.6% | 44.7% | 42.4% | 42.4% | 44.1% |
| Male | 71.1% | 54.1% | 57.1% | 55.6% | 57.3% | 54.4% | 55.3% | 57.6% | 57.6% | 55.9% |