調查日期 <br> Date of survey	18 - 29	30+	整體  <br>Overall
26-27/8/1997	22.2%	26.4%	24.8%
23-24/9/1997	24.5%	23.8%	24.2%
28-29/10/1997	18.3%	24.0%	22.6%
8-9/12/1997	22.8%	23.0%	22.9%
3-4/6/1998	19.3%	19.0%	18.6%
22-24/6/1998	18.2%	18.5%	18.4%
14/8/1998	22.6%	26.8%	25.5%
29/9/1998	19.2%	24.6%	23.0%
21/12/1998	18.8%	23.8%	22.3%
8-9/2/1999	17.7%	21.9%	20.9%
15/4/1999	24.5%	18.5%	20.0%
8/6/1999	24.4%	25.4%	25.0%
6/8/1999	21.4%	24.6%	23.3%
26-27/10/1999	21.5%	25.1%	23.7%
13-15/12/1999	15.4%	23.2%	20.9%
1-2/2/2000	20.7%	24.9%	23.2%
6-7/4/2000	24.9%	20.3%	21.4%
7-8/6/2000	21.4%	23.3%	22.9%
21-25/9/2000	25.3%	28.1%	26.8%
4-12/12/2000	16.6%	19.1%	19.1%
22/3-2/4/2001	21.3%	21.0%	21.7%
1-5/6/2001	20.0%	18.3%	18.3%
13-21/9/2001	26.5%	29.2%	27.9%
7-9/12/2001	19.4%	20.7%	20.5%
12-13/3/2002	23.0%	23.9%	23.3%
4-5/6/2002	14.8%	18.7%	18.1%
2-5/9/2002	25.3%	21.0%	22.0%
13-18/12/2002	21.2%	22.1%	21.3%
1-4/3/2003	22.0%	22.4%	22.3%
13-18/6/2003	17.0%	19.1%	19.2%
10-14/12/2003	27.8%	22.2%	23.4%
7-11/6/2004	22.8%	20.6%	21.2%
6-9/12/2004	25.5%	23.5%	23.1%
6-8/6/2005	18.6%	21.6%	21.2%
9-14/12/2005	26.1%	26.5%	26.5%
13-15/6/2006	23.1%	25.6%	25.1%
6-12/12/2006	28.3%	23.2%	24.3%
8-12/6/2007	29.6%	32.6%	31.8%
11-14/12/2007	39.5%	29.6%	31.5%
11-13/6/2008	35.4%	28.0%	29.2%
9-12/12/2008	28.8%	29.5%	29.6%
8-13/6/2009	35.6%	31.3%	32.0%
8-11/12/2009	27.4%	23.2%	23.9%
9-13/6/2010	30.4%	31.6%	31.3%
13-16/12/2010	29.5%	27.5%	27.6%
21-22/6/2011	25.1%	19.9%	21.3%
12-20/12/2011	32.7%	22.9%	25.3%
13-20/6/2012	15.6%	24.5%	22.7%
14-17/12/2012	41.0%	30.9%	32.8%
10-13/6/2013	28.5%	23.3%	24.3%
9-12/12/2013	28.5%	27.5%	27.7%
6-12/6/2014	33.5%	24.8%	27.1%
10-16/12/2014	21.8%	25.0%	24.4%	
15-18/6/2015	24.0%	27.9%	27.3%	
3-7/12/2015	30.6%	26.8%	27.5%