40%
45%
50%
55%
60%
65%
70%
75%
80%
85%
90%
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
All adults
Republicans/Republican leaners
Democrats/Democratic leaners
