Year Percent of GDP 2004-01-01 16.9385478722775 2005-01-01 19.2118087477762 2006-01-01 18.9600647503889 2007-01-01 22.4853988743788 2008-01-01 24.9534081877544 2009-01-01 19.3137608629325 2010-01-01 19.0869119483858 2011-01-01 20.1938566438295 2012-01-01 24.9648468731102 2013-01-01 24.7424373257150 2014-01-01 25.9310881347217 2015-01-01 25.8572223068781 2016-01-01 25.3114519629122 2017-01-01 28.5312692698435 2018-01-01 25.8612179827940 2019-01-01 25.4985480530960