調查日期 <br> Date of survey	18 - 29	30+	整體  <br>Overall
7-12/97	45.6%	31.9%	35.9%
1-6/98	40.8%	29.7%	33.0%
7-12/98	46.0%	30.6%	35.0%
1-6/99	49.6%	38.0%	41.4%
7-12/99	44.7%	29.1%	33.5%
1-6/00	48.1%	33.5%	37.5%
7-12/00	45.6%	33.9%	36.3%
1-6/01	45.1%	30.8%	33.8%
7-12/01	41.9%	25.2%	29.0%
1-6/02	42.3%	26.5%	29.9%
7-12/02	39.5%	27.1%	30.0%
1-6/03	44.5%	29.0%	32.6%
7-12/2003	32.0%	22.4%	24.9%
1-6/2004	35.9%	25.5%	28.0%
7-12/2004	41.9%	20.9%	25.9%
1-6/2005	42.6%	19.5%	24.0%
7-12/2005	38.5%	20.6%	24.8%
1-6/2006	35.0%	22.4%	24.8%
7-12/2006	32.3%	20.3%	22.4%
1-6/2007	36.1%	20.4%	23.4%
7-12/2007	29.6%	21.5%	23.5%
1-6/2008	22.9%	16.6%	18.1%
7-12/2008	37.5%	17.8%	21.8%
1-6/2009	35.6%	22.4%	24.7%
7-12/2009	46.2%	35.6%	37.6%
1-6/2010	35.8%	22.3%	25.3%
7-12/2010	45.6%	32.5%	35.5%
1-6/2011	56.8%	39.8%	43.8%
7-12/2011	42.4%	36.4%	37.7%
1-6/2012	69.3%	39.7%	45.5%
7-12/2012	44.0%	23.4%	27.3%
1-6/2013	55.8%	34.3%	38.3%
7-12/2013	59.1%	29.3%	34.9%
1-6/2014	53.1%	37.5%	40.2%
7-12/2014	59.8%	37.9%	42.2%	
1-6/2015	62.9%	31.3%	36.5%	
7-12/2015	55.6%	37.0%	40.2%