Year Percent 1995 0.05723 1996 -0.01701 2005 0 2006 0 2007 0 2008 0 2009 0.15879 2010 0.18435 2011 -0.05872 2012 0.20047 2013 -0.1919 2014 0.099 2015 0.00106 2016 0.00063 2017 0.0012