Year Percent 2003 0.57569 2004 6.17184 2005 3.33741 2006 -3.97777 2007 0.68636 2008 1.61378 2009 0.19125 2010 1.95523 2011 -0.0238 2012 1.83764 2013 1.58988 2014 1.18223 2015 -0.0307 2016 -0.32965