May 12, 2016

Year Conservatives Liberals Moderates
2001 18% 56% 41%
 2003 18% 57% 36%
2004 15% 60% 34%
2005 14% 69% 39%
2006 16% 63% 39%
2007 18% 65% 42%
2008 20% 68% 45%
2009 18% 63% 45%
2010 23% 67% 49%
2011 28% 67% 53%
2012 26% 72% 57%
2013 30% 73% 58%
2014 29% 75% 62%
2015 30% 79% 64%
2016 29% 78% 66%

Pew Research Center