調查月份  Month of Survey	半年結調查次數   Number of Surveys  (Half-yearly)	半年結成功樣本   Successful Sample  (Half-yearly)	半年結回應率   Response Rate  (Half-yearly Average)
7-12/04	2	2019	63.7%
1-6/04	2	2029	64.0%
7-12/03	2	2072	66.1%
1-6/03	2	2112	66.7%
7-12/02	2	2076	66.6%
1-6/02	2	2010	60.3%
7-12/01	2	2072	73.5%
1-6/01	2	2116	65.4%
7-12/00	2	2115	51.2%
1-6/00	3	2120	55.3%
7-12/99	3	1675	49.9%
1-6/99	3	1558	52.5%
7-12/98	2	1012	43.8%
1-6/98	2	1065	47.4%
7-12/97	3	1565	44.5%