Year Percent of GDP 2004-01-01 19.7562563718979 2005-01-01 18.9826839017927 2006-01-01 20.7087143358725 2007-01-01 18.1174159697967 2008-01-01 14.0164819616416 2009-01-01 15.3466952454494 2010-01-01 13.8842731104463 2011-01-01 17.0052242970497 2012-01-01 19.7305235396913 2013-01-01 19.3027040896991 2014-01-01 19.3500187953883 2015-01-01 16.0817039950740 2016-01-01 16.0201245449351 2017-01-01 12.4136459112760 2018-01-01 15.4014167912576 2019-01-01 16.4408584363049