Year Percent 2000 82 2001 87 2002 97 2003 93 2004 82 2005 73 2006 62 2007 60 2008 69 2009 70 2010 72 2011 65 2012 63 2013 63 2014 62 2015 62 2016 57 2017 62 2018 61 2019 60 2020 46