Year Percent of GDP 2002-01-01 17.5919 2003-01-01 14.9625 2004-01-01 11.3916 2005-01-01 8.0995 2006-01-01 6.6673 2007-01-01 5.8736 2008-01-01 6.7659 2009-01-01 10.2270 2010-01-01 10.6827 2011-01-01 10.1610 2012-01-01 12.1253 2013-01-01 12.6025 2014-01-01 14.4963 2015-01-01 21.8819 2016-01-01 20.9606 2017-01-01 21.1838 2018-01-01 21.6495 2019-01-01 23.1424