Year Percent of GDP 2004-01-01 16.7328208434018 2005-01-01 19.3433833721035 2006-01-01 18.2533753631243 2007-01-01 22.6416626966258 2008-01-01 24.2841988318608 2009-01-01 25.2578484355909 2010-01-01 28.8283855225141 2011-01-01 35.2524926166533 2012-01-01 32.5705905669201 2013-01-01 32.7462265311708 2014-01-01 46.3740344141198 2015-01-01 48.6354199479302 2016-01-01 46.9316190552451 2017-01-01 45.1921214570954 2018-01-01 46.0919749207437 2019-01-01 46.0283288234107