Year Percent of GDP 2000-01-01 36.5634 2001-01-01 42.9593 2002-01-01 42.0365 2003-01-01 37.2811 2004-01-01 34.5105 2005-01-01 28.2558 2006-01-01 31.9821 2007-01-01 30.1229 2008-01-01 40.4074 2009-01-01 42.1938 2010-01-01 44.7589 2011-01-01 39.0931 2012-01-01 38.8635 2013-01-01 38.1971 2014-01-01 44.2963 2015-01-01 54.4105 2016-01-01 52.7782 2017-01-01 50.4028 2018-01-01 47.2798 2019-01-01 47.9469