Year Percent of GDP 2004-01-01 37.0435264499997 2005-01-01 37.8949833359928 2006-01-01 40.5988041547170 2007-01-01 40.6530513651130 2008-01-01 44.0499054460906 2009-01-01 42.9447500196897 2010-01-01 43.4961507900921 2011-01-01 49.3070075445371 2012-01-01 52.4545655784634 2013-01-01 47.0609030796027 2014-01-01 49.6390602486857 2015-01-01 56.3089915391781 2016-01-01 47.9963245578275 2017-01-01 47.3383636603814 2018-01-01 44.4730138389326 2019-01-01 42.3850694724033