Year Percent of GDP 2004-01-01 13.6070611827770 2005-01-01 17.0675179144855 2006-01-01 14.0742354806054 2007-01-01 13.3068595553542 2008-01-01 16.4123934212864 2009-01-01 16.6334416135736 2010-01-01 18.6019692060095 2011-01-01 15.7003657503919 2012-01-01 16.3655376408545 2013-01-01 14.9210621672671 2014-01-01 20.0199309199545 2015-01-01 14.9457048249788 2016-01-01 12.5724797529698 2017-01-01 14.8246392476964 2018-01-01 15.7417291148415 2019-01-01 16.3502426975946