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)
7-12/03	2	2090	64.6%
1-6/03	2	2070	67.6%
7-12/02	2	2096	65.4%
1-6/02	2	2063	64.6%
7-12/01	2	2102	71.0%
1-6/01	2	2128	63.4%
7-12/00	2	2125	56.6%
1-6/00	4	2631	53.9%
7-12/99	3	1646	48.4%
1-6/99	3	1590	49.3%
7-12/98	3	1550	47.2%
1-6/98	2	1047	47.0%
7-12/97	2	1087	43.5%