Year Percent of GDP 2004-01-01 54.8405329131362 2005-01-01 57.4866301493510 2006-01-01 41.1564327464203 2007-01-01 39.9396505119416 2008-01-01 42.1317026074365 2009-01-01 30.6058614613467 2010-01-01 35.0500348730210 2011-01-01 33.8523605549372 2012-01-01 31.0214555094568 2013-01-01 30.8224812865390 2014-01-01 29.9873409536363 2015-01-01 29.5846243320053 2016-01-01 29.6175203919520 2017-01-01 29.2164529943770 2018-01-01 28.3436364202588 2019-01-01 27.8513674726436