Year	Favor	Oppose
2001	35%	57%
2003	32%	59%
2004	31%	60%
2005	36%	53%
2006	35%	55%
2007	37%	54%
2008	39%	51%
2009	37%	54%
2010	42%	48%
2011	46%	45%
2012	48%	43%
2013	50%	43%
2014	52%	40%
2015	55%	39%
2016	55%	37%
2017	62%	32%