Year Percent of GDP 2004-01-01 19.3761731170271 2005-01-01 17.3558288953462 2006-01-01 16.4776544039618 2007-01-01 16.0430020224717 2008-01-01 15.7015013599646 2009-01-01 15.3843135751765 2010-01-01 14.4850919559429 2011-01-01 12.8987664389302 2012-01-01 12.2547816306293 2013-01-01 12.1060418196104 2014-01-01 12.3160080808800 2015-01-01 11.4413528050478 2016-01-01 12.4393117504191 2017-01-01 11.7620159727397 2018-01-01 13.2624620419058 2019-01-01 11.8731727730377