Year Percent of GDP 2004-01-01 14.2443073407005 2005-01-01 17.8739790810113 2006-01-01 19.8708562704653 2007-01-01 19.3374652375253 2008-01-01 17.0703784250715 2009-01-01 19.9663580659471 2010-01-01 20.8835150256655 2011-01-01 25.4930815226772 2012-01-01 26.6916931472842 2013-01-01 26.6611936777597 2014-01-01 27.5096191546701 2015-01-01 30.6547152740006 2016-01-01 31.1713040438581 2017-01-01 21.7911368702336 2018-01-01 27.5804843956536 2019-01-01 24.2863929231356