Year Percent of GDP 2009-01-01 0.0088 2010-01-01 0.0041 2011-01-01 0.0919 2012-01-01 0.1197 2013-01-01 0.2346 2014-01-01 0.3092 2015-01-01 0.4130 2016-01-01 0.4025