人口變項   Demographic profile of respondents

11-14/12/07 4-7/9/07 8-12/6/07 7-12/3/07 6-12/12/06 1-7/9/06 13-15/6/06 2-8/3/06 9-14/12/05 1-7/9/05 6-8/6/05 1-3/3/05