樣本資料 Contact Information

調查日期  Date of Survey	成功樣本 Successful Sample	回應率 Response Rate	標準誤差 Standard Error
26-30/3/2007	509	62.8%	2.2%
20-23/6/2005	1026	61.9%	1.5%
11/12/1996	1301	65.3%	1.5%