Year Percent of GDP 2000-01-01 21.7318 2001-01-01 21.8985 2002-01-01 22.2738 2003-01-01 21.6310 2004-01-01 21.7581 2005-01-01 21.2836 2006-01-01 21.4161 2007-01-01 21.8007 2008-01-01 23.8348 2009-01-01 22.7436 2010-01-01 22.9169 2011-01-01 24.7059 2012-01-01 24.0359 2013-01-01 24.9771 2014-01-01 25.3967 2015-01-01 23.2148 2016-01-01 22.6713 2017-01-01 24.0119 2018-01-01 24.5822 2019-01-01 25.7074