Year Percent 2000 40 2001 38 2002 46 2003 60 2004 49 2005 61 2006 67 2007 69 2008 76 2009 100 2010 90 2011 91 2012 82 2013 73 2014 75 2015 79 2016 81 2017 76 2018 73 2019 73 2020 60