Year Percent of GDP 2004-01-01 39.8549606105993 2005-01-01 43.3523874048203 2006-01-01 44.5383289466203 2007-01-01 40.6760832648391 2008-01-01 38.9298342807781 2009-01-01 36.8177845775043 2010-01-01 33.8258925563051 2011-01-01 35.7938868502676 2012-01-01 36.5939075822000 2013-01-01 37.3497148925130 2014-01-01 38.0902276821192 2015-01-01 31.0965246271354 2016-01-01 33.1252657758627 2017-01-01 31.4898018624238 2018-01-01 28.7823450330790 2019-01-01 28.5095128295431