Year Percent of GDP 2004-01-01 21.8182582330337 2005-01-01 22.1737335795172 2006-01-01 23.1933135715436 2007-01-01 23.6413424196812 2008-01-01 23.4784959158404 2009-01-01 26.3068193414679 2010-01-01 28.0201896361806 2011-01-01 28.7676050456495 2012-01-01 28.3258396002137 2013-01-01 29.7782081528349 2014-01-01 31.7553439286227 2015-01-01 35.2398225064399 2016-01-01 37.4479434421097 2017-01-01 37.5286045615801 2018-01-01 36.4963503649635 2019-01-01 44.3458980044346