Year Percent of GDP 2000-01-01 30.3302 2001-01-01 32.0352 2002-01-01 31.5323 2003-01-01 28.7274 2004-01-01 28.8976 2005-01-01 29.0588 2006-01-01 28.4518 2007-01-01 28.0796 2008-01-01 23.0064 2009-01-01 32.8549 2010-01-01 30.6119 2011-01-01 28.5017 2012-01-01 30.9867 2013-01-01 28.2925 2014-01-01 33.3983 2015-01-01 41.5188 2016-01-01 39.9443 2017-01-01 32.3586 2018-01-01 30.3703 2019-01-01 28.1769