Year Percent of GDP 2004-01-01 12.7600254401070 2005-01-01 11.5102853895914 2006-01-01 13.9319746503363 2007-01-01 17.0609137178087 2008-01-01 18.7948443979805 2009-01-01 24.1386480783630 2010-01-01 24.3544903593082 2011-01-01 22.3682612143174 2012-01-01 23.8787772710095 2013-01-01 22.8049766058420 2014-01-01 21.9778975837811 2015-01-01 18.3409353898768 2016-01-01 14.5180268511458 2017-01-01 15.1618814349083 2018-01-01 15.1143475009280 2019-01-01 14.9583831696667