Year Percent of GDP 2002-01-01 32.6705 2003-01-01 38.8071 2004-01-01 30.7587 2005-01-01 28.6622 2006-01-01 24.4859 2007-01-01 25.4537 2008-01-01 25.5922 2009-01-01 23.7269 2010-01-01 22.4775 2011-01-01 22.3067 2012-01-01 27.7088 2013-01-01 25.7545 2014-01-01 29.4565 2015-01-01 32.7726 2016-01-01 28.1071 2017-01-01 27.0849 2018-01-01 26.6415 2019-01-01 26.3924