人口變項
Demographic profile of respondents
8-12/11/2010
18-20/5/2010
19-23/11/2009
19-22/5/2009
26-30/11/2008
28/5-2/6/2008
22-25/10/2007
17-20/04/2007
3-6/10/2006
18-21/4/2006
20-21/10/2005
11-14/4/2005