Year Percent of GDP 2004-01-01 28.8117095164552 2005-01-01 32.7387582538423 2006-01-01 33.3256405760181 2007-01-01 39.0180587722910 2008-01-01 37.8144620049656 2009-01-01 37.1303429907632 2010-01-01 38.7284294622813 2011-01-01 38.0031060201322 2012-01-01 39.0263020011207 2013-01-01 38.2965659413755 2014-01-01 38.7926463074917 2015-01-01 40.5768284828579 2016-01-01 34.3003227184657 2017-01-01 31.4132946286955 2018-01-01 32.7344000060623 2019-01-01 32.7344000060623