Year Percent of GDP 2008-01-01 32.2248 2009-01-01 36.7157 2010-01-01 35.4253 2011-01-01 29.1123 2012-01-01 26.2527 2013-01-01 23.1060 2014-01-01 21.3951 2015-01-01 20.0782 2016-01-01 25.4783