Year College graduate or more Some college / Associate degree High school graduate or less
2005 12 8 4
2006 9 17 9
2008 29 32 20
2009 49 47 28
2010 56 55 35
2011 61 61 39
2012 65 65 44
2013 72 69 51
2014 69 71 50
2015 76 70 54

Source: Pew Research Center surveys, 2005-2006, 2008-2015. No data are available for 2007.