Year Percent of GDP 2000-01-01 24.0659 2001-01-01 22.7850 2002-01-01 22.9923 2003-01-01 27.7898 2004-01-01 28.6546 2005-01-01 30.7450 2006-01-01 30.8296 2007-01-01 29.9763 2008-01-01 28.5196 2009-01-01 31.4739 2010-01-01 30.4580 2011-01-01 27.7906 2012-01-01 25.7715 2013-01-01 27.2746 2014-01-01 26.2651 2015-01-01 30.3368 2016-01-01 29.2155 2017-01-01 29.5377 2018-01-01 27.7668 2019-01-01 26.7259