| Gender | Year | |||||||||
| 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | |
| Total | 3,955 | 5,526 | 7,261 | 9,297 | 11,562 | 13,958 | 16,133 | 17,953 | 16,790 | 17,171 |
| Female | 1,835 | 2,535 | 3,242 | 4,057 | 4,976 | 6,000 | 6,918 | 7,674 | 7,187 | 7,212 |
| Male | 2,120 | 2,991 | 4,019 | 5,240 | 6,586 | 7,958 | 9,215 | 10,279 | 9,603 | 9,959 |
| Total (%) | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Female | 46.4% | 45.9% | 44.6% | 43.6% | 43.0% | 43.0% | 42.9% | 42.7% | 42.8% | 42.0% |
| Male | 53.6% | 54.1% | 55.4% | 56.4% | 57.0% | 57.0% | 57.1% | 57.3% | 57.2% | 58.0% |