人口變項
Demographic profile of respondents
16-25/5/07
18-25/5/06
21-24/5/05
18-20/5/04
15-20/5/03
14-16/5/02
25-29/5/01
30-31/5/00
24/5/99
26/5/98
27/5/97
22-23/5/96
29-31/5/95
17-20/5/94
10-11/5/93