Year Percent of GDP 2000-01-01 22.8372 2001-01-01 24.3873 2002-01-01 23.0177 2003-01-01 21.8283 2004-01-01 19.9934 2005-01-01 13.4963 2006-01-01 10.5277 2007-01-01 8.3111 2008-01-01 6.9045 2009-01-01 12.3950 2010-01-01 12.5183 2011-01-01 11.2229 2012-01-01 13.7502 2013-01-01 12.6458 2014-01-01 14.3925 2015-01-01 34.9944 2016-01-01 50.7105 2017-01-01 54.7018 2018-01-01 54.9073 2019-01-01 56.3657