Year Percent of GDP 2004-01-01 14.5914896615817 2005-01-01 15.9031167878472 2006-01-01 16.1260562085437 2007-01-01 17.6183620045222 2008-01-01 19.1579243736591 2009-01-01 22.6158032029418 2010-01-01 23.5376139526124 2011-01-01 23.1167075517785 2012-01-01 21.9399843073078 2013-01-01 19.8370308476454 2014-01-01 21.7244776337991 2015-01-01 23.9656035994402 2016-01-01 25.0995276704213 2017-01-01 24.5137465266498 2018-01-01 25.3003970404107 2019-01-01 25.6192725538789