Year Percent of GDP 2004-01-01 23.2725474127428 2005-01-01 22.4514667766681 2006-01-01 19.6915359714606 2007-01-01 19.9229002939103 2008-01-01 19.4574021913527 2009-01-01 17.8070918100404 2010-01-01 18.0658966970344 2011-01-01 19.5270561915568 2012-01-01 21.5261929255661 2013-01-01 23.7805229570582 2014-01-01 24.5994337252867 2015-01-01 28.1080246736571 2016-01-01 24.0378755928415 2017-01-01 25.3468197831564 2018-01-01 27.6121427251406 2019-01-01 27.3509520610052