| Gender | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | |
| Total | 118 | 148 | 237 | 344 | 464 | 487 | 534 | 420 | 330 | 289 |
| Female | 53 | 64 | 108 | 149 | 202 | 202 | 235 | 184 | 157 | 133 |
| Male | 65 | 84 | 129 | 195 | 262 | 285 | 299 | 236 | 173 | 156 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 44.9% | 43.2% | 45.6% | 43.3% | 43.5% | 41.5% | 44.0% | 43.8% | 47.6% | 46.0% |
| Male | 55.1% | 56.8% | 54.4% | 56.7% | 56.5% | 58.5% | 56.0% | 56.2% | 52.4% | 54.0% |