Year Percent of GDP 2004-01-01 9.35842465597928 2005-01-01 9.30914223619338 2006-01-01 9.62667810312812 2007-01-01 11.17102484862840 2008-01-01 14.28150497075510 2009-01-01 12.40093002969810 2010-01-01 15.40346281620020 2011-01-01 14.89864872825840 2012-01-01 16.81952277410160 2013-01-01 20.35787677663980 2014-01-01 18.53260536557510 2015-01-01 18.41745855883810 2016-01-01 21.03142183561730 2017-01-01 21.44216124241380 2018-01-01 21.63121952621560 2019-01-01 21.84185655748850