調查日期 <br> Date of survey	18 - 29	30+	整體  <br>Overall
26-27/8/1997	16.5%	19.7%	18.6%
23-24/9/1997	12.9%	19.8%	17.5%
28-29/10/1997	18.3%	17.5%	17.5%
8-9/12/1997	16.8%	17.4%	18.2%
3-4/6/1998	23.6%	25.3%	24.8%
22-24/6/1998	20.7%	24.9%	23.7%
14/8/1998	17.8%	24.5%	22.6%
29/9/1998	17.7%	20.6%	19.9%
21/12/1998	17.5%	16.7%	17.2%
8-9/2/1999	19.8%	16.0%	17.6%
15/4/1999	11.3%	20.3%	18.0%
8/6/1999	14.1%	18.5%	17.0%
6/8/1999	22.9%	26.0%	25.3%
26-27/10/1999	24.3%	26.9%	25.5%
13-15/12/1999	21.0%	19.1%	19.9%
1-2/2/2000	10.3%	15.2%	13.8%
6-7/4/2000	21.3%	22.0%	20.4%
7-8/6/2000	20.8%	23.8%	22.8%
21-25/9/2000	14.1%	18.2%	17.4%
4-12/12/2000	22.0%	26.8%	25.2%
22/3-2/4/2001	22.6%	30.3%	28.2%
1-5/6/2001	20.0%	31.1%	28.4%
13-21/9/2001	19.6%	26.2%	25.8%
7-9/12/2001	25.8%	33.6%	31.5%
12-13/3/2002	24.7%	29.1%	28.3%
4-5/6/2002	27.0%	33.5%	32.5%
2-5/9/2002	28.1%	34.3%	32.5%
13-18/12/2002	23.3%	30.7%	29.7%
1-4/3/2003	29.8%	33.1%	32.3%
13-18/6/2003	21.1%	31.2%	29.0%
10-14/12/2003	26.4%	34.9%	32.5%
7-11/6/2004	27.8%	34.1%	33.0%
6-9/12/2004	19.5%	34.0%	31.6%
6-8/6/2005	29.3%	37.4%	36.4%
9-14/12/2005	21.7%	33.8%	30.7%
13-15/6/2006	30.5%	35.5%	34.6%
6-12/12/2006	30.7%	32.1%	31.8%
8-12/6/2007	21.0%	27.7%	26.4%
11-14/12/2007	20.0%	29.4%	27.2%
11-13/6/2008	29.0%	41.1%	38.6%
9-12/12/2008	23.2%	37.6%	34.4%
8-13/6/2009	22.7%	30.4%	29.3%
8-11/12/2009	18.0%	25.6%	24.2%
9-13/6/2010	21.6%	29.4%	27.8%
13-16/12/2010	16.1%	22.6%	21.1%
21-22/6/2011	11.3%	27.3%	23.5%
12-20/12/2011	11.8%	18.1%	16.6%
13-20/6/2012	8.0%	20.7%	18.2%
14-17/12/2012	5.1%	25.2%	21.4%
10-13/6/2013	8.7%	26.0%	22.8%
9-12/12/2013	7.1%	24.9%	21.5%
6-12/6/2014	3.6%	23.7%	19.5%
10-16/12/2014	6.5%	20.5%	17.8%	
15-18/6/2015	5.3%	25.4%	22.1%	
3-7/12/2015	7.6%	20.2%	18.0%