調查日期  Date of survey	成功樣本  Successful Sample	回應率  Response Rate
17-19/6/02	1010	65.4%
8-13/6/01	1074	72.5%
9-12/6/00	1103	54.6%
21/6/99	526	51.9%
3-4/6/98	555	45.7%
30/6/97	544	77.4%