Year Percent of GDP 2004-01-01 23.5631452069245 2005-01-01 22.3783591384150 2006-01-01 24.2323315740770 2007-01-01 24.2508540227487 2008-01-01 24.7848627196958 2009-01-01 29.7363297806790 2010-01-01 29.3321077306669 2011-01-01 36.8899911416522 2012-01-01 40.0865230265107 2013-01-01 33.8992243371054 2014-01-01 39.3505343755932 2015-01-01 44.7241704226241 2016-01-01 40.8292771097314 2017-01-01 43.2881909295556 2018-01-01 40.0826102735087 2019-01-01 38.5971606657908