Year Percent of GDP 2004-01-01 17.6743971620194 2005-01-01 17.1687255812197 2006-01-01 19.4742234035516 2007-01-01 21.5683428802743 2008-01-01 22.3530136897533 2009-01-01 25.4231631463732 2010-01-01 25.6106288977885 2011-01-01 25.0796398217697 2012-01-01 24.3862283106380 2013-01-01 25.4278443433123 2014-01-01 24.4996047264457 2015-01-01 25.7710562044033 2016-01-01 30.5277728966622 2017-01-01 29.4842913243278 2018-01-01 29.0559443602178 2019-01-01 29.0559443602177