人口變項   Demographic profile of respondents

18-24/9/2010 9-15/3/2010 24-30/9/2009 17-18/3/2009 23-29/9/2008 25-27/3/2008 17-21/9/2007 13-16/3/2007 14-20/9/2006 13-17/3/2006 15-21/9/2005 1-7/9/2005 20-22/3/2005 14-17/3/2005