| Gender | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | |
| Total | 215 | 230 | 254 | 326 | 343 | 447 | 662 | 901 | 882 | 892 |
| Female | 70 | 96 | 110 | 134 | 141 | 212 | 301 | 393 | 388 | 374 |
| Male | 145 | 134 | 144 | 192 | 202 | 235 | 361 | 508 | 494 | 518 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 32.6% | 41.7% | 43.3% | 41.1% | 41.1% | 47.4% | 45.5% | 43.6% | 44.0% | 41.9% |
| Male | 67.4% | 58.3% | 56.7% | 58.9% | 58.9% | 52.6% | 54.5% | 56.4% | 56.0% | 58.1% |