Year Percent 2002 0.01291 2003 0.40874 2004 0.16804 2005 0.7514 2006 0.73797 2007 -0.08837 2008 0.95951 2009 0.22574 2010 2.55455 2011 1.80002 2012 1.15407 2013 1.18279 2014 1.67287 2015 0.48615 2016 0.53363 2017 3.33678