Year Percent of GDP 2004-01-01 59.7955078052892 2005-01-01 54.9403177438684 2006-01-01 38.3613366668510 2007-01-01 28.7877068974973 2008-01-01 26.1321934159474 2009-01-01 23.4435176055788 2010-01-01 23.3446660164663 2011-01-01 32.2907325219882 2012-01-01 24.1883480022837 2013-01-01 21.3136076697480 2014-01-01 22.8422081536883 2015-01-01 19.8295860178337 2016-01-01 16.8814063548495 2017-01-01 16.2811039305083 2018-01-01 15.6648524375044 2019-01-01 14.2137733958679