Year Percent 2006-01-01 2.92451258123646 2007-01-01 4.34712215656114 2008-01-01 8.75872769588797 2009-01-01 3.46672373207794 2010-01-01 0.65494657014848 2011-01-01 3.45014311248693 2012-01-01 4.14524724981109 2013-01-01 2.20589268141181 2014-01-01 -0.71051405171022 2015-01-01 1.54869158222488 2016-01-01 -0.27138502338526 2017-01-01 2.38023599053136