調查日期   Date of Survey	成功樣本   Successful Sample	回應率   Response Rate
18-20/5/04	1039	62.3%
15-20/5/03	1067	65.1%
14-16/5/02	1009	63.6%
25-29/5/01	1055	69.4%
30-31/5/00	1103	49.7%
24/5/99	528	48.2%
26/5/98	553	53.6%
27/5/97	531	44.4%
22-23/5/96	521	45.5%
29-31/5/95	504	51.7%
17-20/5/94	504	63.9%
10-11/5/93	573	54.3%