| Gender | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | |
| Total | 2,477 | 2,420 | 2,255 | 2,054 | 1,808 | 1,588 | 1,329 | 1,323 | 1,406 | 1,684 |
| Female | 526 | 493 | 441 | 429 | 406 | 365 | 309 | 313 | 352 | 408 |
| Male | 1,951 | 1,927 | 1,814 | 1,625 | 1,402 | 1,223 | 1,020 | 1,010 | 1,054 | 1,276 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 21.2% | 20.4% | 19.6% | 20.9% | 22.5% | 23.0% | 23.3% | 23.7% | 25.0% | 24.2% |
| Male | 78.8% | 79.6% | 80.4% | 79.1% | 77.5% | 77.0% | 76.7% | 76.3% | 75.0% | 75.8% |