Year Percent 2003 0.15585 2004 0.28898 2005 -0.15563 2006 -3.40196 2007 3.27895 2008 -1.12271 2009 -2.86966 2010 1.50762 2011 0.8684 2012 -4.23659 2013 -2.89189 2014 0.70817 2015 1.06574 2016 -2.72801