Year Percent of GDP 1990-01-01 18.7584764956458 1991-01-01 17.9557043862886 1992-01-01 21.2303070910667 1993-01-01 26.2687423552823 1994-01-01 28.6119802949282 1995-01-01 31.4170027923750 1996-01-01 31.7594798264806 1997-01-01 33.0371556189196 1998-01-01 32.5116938738753 1999-01-01 30.9010175499645 2000-01-01 36.4823009548882 2001-01-01 33.3344584914974 2002-01-01 32.3076434785009 2003-01-01 30.9521956542724 2004-01-01 31.0317686877060 2005-01-01 31.9611325652721 2006-01-01 35.6545048000341 2007-01-01 35.2312715018699 2008-01-01 33.7487352965388 2009-01-01 24.8672364461894 2010-01-01 27.7585787524952 2011-01-01 28.8331077683741 2012-01-01 28.5994619269155 2013-01-01 27.6544402915010 2014-01-01 27.1616848804670 2015-01-01 25.7393820691191 2016-01-01 24.1913919304229 2017-01-01 26.9066047090678