Year Percent 2000 7.68979 2001 7.43695 2002 7.06818 2003 6.22058 2004 3.28265 2005 1.99037 2006 1.64042 2007 2.0097 2008 1.83999 2009 2.24719 2010 2.20072 2011 1.71772 2012 1.86178 2013 1.662 2014 1.83419 2015 1.62671 2016 2.2848