Year Percent of GDP 2004-01-01 24.2430743759788 2005-01-01 28.0577653312197 2006-01-01 28.5041022286439 2007-01-01 28.5306346972833 2008-01-01 28.1361213434035 2009-01-01 26.5069844397329 2010-01-01 26.4203543635192 2011-01-01 26.8002048794166 2012-01-01 26.9417112825868 2013-01-01 27.3264480320070 2014-01-01 27.5893457998202 2015-01-01 28.1406923644815 2016-01-01 28.6480808052016 2017-01-01 28.2942963107062 2018-01-01 29.0267465005523 2019-01-01 29.5213894597433