Year Percent of GDP 2004-01-01 20.26292190610300 2005-01-01 20.33943946622430 2006-01-01 13.68111671749120 2007-01-01 12.67357544772260 2008-01-01 12.71354030230350 2009-01-01 9.26379590875606 2010-01-01 9.29899503363123 2011-01-01 9.99380901351251 2012-01-01 9.49805873514442 2013-01-01 9.31667511953264 2014-01-01 8.48321773783763 2015-01-01 8.12078268456253 2016-01-01 8.10662095605349 2017-01-01 7.82741640059656 2018-01-01 7.16288291671528 2019-01-01 6.96766857481659