Year Percent 2000 12.08238 2001 11.34799 2002 10.63653 2003 9.8586 2004 9.17294 2005 8.45768 2006 7.99587 2007 6.89109 2008 7.0021 2009 6.8712 2010 6.83583 2011 6.71717 2012 6.84452 2013 6.9477 2014 7.06751 2015 7.05802 2016 7.47518