| Gender | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | |
| Total | 1,873 | 2,175 | 3,002 | 3,659 | 4,265 | 4,194 | 4,137 | 4,110 | 4,167 | 3,577 |
| Female | 867 | 1,023 | 1,355 | 1,585 | 1,871 | 1,899 | 1,811 | 1,817 | 1,759 | 1,484 |
| Male | 1,006 | 1,152 | 1,647 | 2,074 | 2,394 | 2,295 | 2,326 | 2,293 | 2,408 | 2,093 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 46.3% | 47.0% | 45.1% | 43.3% | 43.9% | 45.3% | 43.8% | 44.2% | 42.2% | 41.5% |
| Male | 53.7% | 53.0% | 54.9% | 56.7% | 56.1% | 54.7% | 56.2% | 55.8% | 57.8% | 58.5% |