Year Percent of GDP 2000-01-01 19.2766 2001-01-01 21.8260 2002-01-01 19.4622 2003-01-01 19.8978 2004-01-01 22.4256 2005-01-01 25.4549 2006-01-01 20.9707 2007-01-01 25.0525 2008-01-01 25.2979 2009-01-01 26.8674 2010-01-01 24.7686 2011-01-01 31.3992 2012-01-01 33.9283 2013-01-01 34.9979 2014-01-01 38.1720 2015-01-01 39.1779 2016-01-01 35.1709 2017-01-01 34.8157 2018-01-01 36.7281 2019-01-01 38.7652