Year Percent of GDP 2000-01-01 32.0163 2001-01-01 38.3172 2002-01-01 44.1161 2003-01-01 42.7833 2004-01-01 35.8421 2005-01-01 28.8731 2006-01-01 22.3841 2007-01-01 17.6886 2008-01-01 13.8850 2009-01-01 14.9080 2010-01-01 17.8892 2011-01-01 17.8438 2012-01-01 17.9325 2013-01-01 20.3688 2014-01-01 21.2923 2015-01-01 17.7093 2016-01-01 19.4784 2017-01-01 32.5030 2018-01-01 38.9068 2019-01-01 33.8477