Year Percent of GDP 2010-01-01 28.4148 2011-01-01 35.6370 2012-01-01 33.3114 2013-01-01 31.0295 2014-01-01 24.9265 2015-01-01 13.1251 2016-01-01 10.6107 2017-01-01 9.8640