Year Percent of GDP 2004-01-01 22.1343046135812 2005-01-01 17.8111926750335 2006-01-01 18.9645553613270 2007-01-01 24.0850141573741 2008-01-01 20.3757044458359 2009-01-01 21.9026020529959 2010-01-01 23.1315179606025 2011-01-01 24.1348448687351 2012-01-01 22.5553793666811 2013-01-01 27.8144963416521 2014-01-01 28.5738097718512 2015-01-01 25.5822015579754 2016-01-01 24.5935824144344 2017-01-01 28.4009669381639 2018-01-01 28.3524290228259 2019-01-01 28.7008753787787