Year Percent of GDP 2009-01-01 13.4060 2010-01-01 13.7934 2011-01-01 14.6190 2012-01-01 14.6628 2013-01-01 16.8756 2014-01-01 17.0111 2015-01-01 17.3132 2016-01-01 14.0812 2017-01-01 17.6973 2018-01-01 15.9405 2019-01-01 15.3720