調查日期 <br> Date of survey	18 - 29	30+	整體  <br>Overall
7-12/97	37.0%	46.5%	43.5%
1-6/98	35.3%	41.5%	39.3%
7-12/98	33.0%	44.9%	41.4%
1-6/99	32.4%	37.0%	35.2%
7-12/99	32.2%	42.7%	39.6%
1-6/00	32.7%	40.4%	38.4%
7-12/00	32.0%	38.8%	37.1%
1-6/01	31.5%	35.6%	34.7%
7-12/01	33.8%	40.5%	38.2%
1-6/02	30.1%	38.2%	36.2%
7-12/02	34.1%	37.5%	36.3%
1-6/03	29.3%	36.0%	34.2%
7-12/2003	40.6%	39.0%	39.0%
1-6/2004	34.0%	36.8%	35.5%
7-12/2004	38.6%	40.9%	39.3%
1-6/2005	27.0%	39.5%	35.9%
7-12/2005	39.5%	44.5%	43.4%
1-6/2006	33.3%	41.7%	40.0%
7-12/2006	36.6%	46.0%	44.4%
1-6/2007	41.8%	50.1%	48.5%
7-12/2007	49.1%	47.4%	47.5%
1-6/2008	47.6%	41.4%	42.5%
7-12/2008	38.1%	43.6%	42.6%
1-6/2009	41.8%	46.4%	45.3%
7-12/2009	34.9%	37.5%	37.0%
1-6/2010	42.1%	47.1%	46.0%
7-12/2010	37.0%	43.0%	41.4%
1-6/2011	29.6%	32.3%	31.7%
7-12/2011	41.5%	43.6%	43.1%
1-6/2012	21.5%	37.5%	34.4%
7-12/2012	49.2%	48.9%	49.0%
1-6/2013	34.5%	36.7%	36.3%
7-12/2013	33.2%	44.9%	42.6%
1-6/2014	43.3%	37.0%	38.7%
7-12/2014	32.8%	41.0%	39.4%	
1-6/2015	31.7%	42.1%	40.4%	
7-12/2015	36.2%	41.6%	40.7%