Year Percent of GDP 2004-01-01 40.3329317961129 2005-01-01 39.1902740906746 2006-01-01 39.7119101918644 2007-01-01 31.7259201877468 2008-01-01 31.3592542324973 2009-01-01 32.8828184558640 2010-01-01 34.2363532537520 2011-01-01 37.2340397454658 2012-01-01 36.6531127982792 2013-01-01 33.8471592990187 2014-01-01 34.2884658953281 2015-01-01 33.4341461261052 2016-01-01 36.6321039176717 2017-01-01 35.5850620787959 2018-01-01 38.0998435880026 2019-01-01 35.6442899778981