| Gender | Year | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | |
| Total | 53,375 | 59,845 | 65,231 | 71,591 | 76,845 | 78,419 | 81,820 | 85,345 | 88,961 | 93,820 |
| Female | 22,708 | 25,240 | 27,633 | 30,291 | 32,571 | 33,243 | 34,779 | 36,038 | 37,243 | 39,203 |
| Male | 30,667 | 34,605 | 37,598 | 41,300 | 44,274 | 45,176 | 47,041 | 49,307 | 51,718 | 54,617 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 42.5% | 42.2% | 42.4% | 42.3% | 42.4% | 42.4% | 42.5% | 42.2% | 41.9% | 41.8% |
| Male | 57.5% | 57.8% | 57.6% | 57.7% | 57.6% | 57.6% | 57.5% | 57.8% | 58.1% | 58.2% |