調查日期  Date of Survey	即日/跟進調查  Instant/Follow-up survey	成功樣本   Successful Sample	回應率   Response Rate
21-23/10/2001	跟進調查  Follow-up survey	1060	65.0%
10/10/2001	即日調查  Instant survey	1051	66.0%
23-25/10/2000	跟進調查  Follow-up survey	1031	60.3%
11/10/2000	即日調查  Instant survey	1059	69.7%
22/10/1999	第二次跟進調查  Second follow-up survey	557	49.0%
11,16/10/1999	第一次跟進調查  First follow-up survey	520	47.5%
6/10/1999	即日調查  Instant survey	888	54.5%
20/10/1998	跟進調查  Follow-up survey	533	46.4%
7/10/1998	即日調查  Instant survey	1494	56.5%
14-15/10/1997	跟進調查  Follow-up survey	517	46.6%
8/10/1997	即日調查  Instant survey	1482	62.9%