Year Percent of GDP 2007-01-01 0.3391 2008-01-01 0.4280 2009-01-01 0.5314 2010-01-01 0.6237 2011-01-01 0.4140 2012-01-01 0.4107 2013-01-01 0.4123 2014-01-01 0.4624 2015-01-01 0.5748 2016-01-01 0.6947 2017-01-01 0.6565