調查日期 <br> Date of survey	18 - 29	30+	整體  <br>Overall
26-27/8/1997	31.6%	41.6%	38.7%
23-24/9/1997	30.3%	41.0%	37.8%
28-29/10/1997	31.3%	40.7%	37.6%
8-9/12/1997	31.5%	39.8%	37.1%
3-4/6/1998	37.9%	45.9%	43.5%
22-24/6/1998	36.8%	45.5%	42.9%
14/8/1998	35.6%	45.1%	42.3%
29/9/1998	30.0%	40.2%	37.3%
21/12/1998	24.3%	35.4%	32.3%
8-9/2/1999	30.9%	33.8%	32.9%
15/4/1999	24.5%	34.2%	31.1%
8/6/1999	20.6%	31.9%	28.2%
6/8/1999	36.1%	43.9%	42.8%
26-27/10/1999	38.0%	43.3%	41.7%
13-15/12/1999	32.3%	40.2%	37.1%
1-2/2/2000	20.6%	37.8%	33.3%
6-7/4/2000	31.8%	36.5%	34.6%
7-8/6/2000	31.0%	39.3%	36.8%
21-25/9/2000	25.8%	32.5%	31.9%
4-12/12/2000	32.4%	43.0%	39.0%
22/3-2/4/2001	35.4%	47.5%	44.2%
1-5/6/2001	29.0%	45.8%	41.7%
13-21/9/2001	32.7%	46.0%	43.4%
7-9/12/2001	34.4%	44.8%	41.9%
12-13/3/2002	35.9%	49.3%	46.2%
4-5/6/2002	38.1%	46.9%	45.5%
2-5/9/2002	38.3%	51.0%	47.5%
13-18/12/2002	34.8%	46.0%	44.0%
1-4/3/2003	40.8%	50.1%	47.3%
13-18/6/2003	29.6%	44.6%	40.9%
10-14/12/2003	39.2%	51.8%	48.1%
7-11/6/2004	39.0%	50.3%	47.3%
6-9/12/2004	32.5%	51.4%	47.8%
6-8/6/2005	37.7%	55.3%	51.1%
9-14/12/2005	35.1%	51.9%	47.6%
13-15/6/2006	40.6%	51.6%	49.4%
6-12/12/2006	39.0%	54.9%	51.9%
8-12/6/2007	33.2%	45.2%	43.1%
11-14/12/2007	29.6%	47.2%	43.2%
11-13/6/2008	41.2%	54.5%	51.9%
9-12/12/2008	32.5%	51.6%	47.4%
8-13/6/2009	28.8%	45.5%	42.7%
8-11/12/2009	25.5%	39.9%	37.3%
9-13/6/2010	33.3%	44.9%	42.5%
13-16/12/2010	23.6%	38.1%	35.0%
21-22/6/2011	15.8%	39.6%	33.8%
12-20/12/2011	20.5%	38.8%	34.4%
13-20/6/2012	13.8%	33.8%	29.9%
14-17/12/2012	13.3%	43.3%	37.6%
10-13/6/2013	14.6%	39.4%	34.8%
9-12/12/2013	11.8%	42.2%	36.5%
6-12/6/2014	13.3%	35.8%	31.1%
10-16/12/2014	17.5%	36.5%	32.9%	
15-18/6/2015	13.0%	39.6%	35.2%	
3-7/12/2015	13.3%	34.9%	31.2%