Year Percent of GDP 2004-01-01 16.1709 2005-01-01 23.3806 2006-01-01 26.6418 2007-01-01 30.3470 2008-01-01 26.9216 2009-01-01 35.3007 2010-01-01 43.6020 2011-01-01 41.9089 2012-01-01 36.2613 2013-01-01 29.8289 2014-01-01 23.5045 2015-01-01 25.7802 2016-01-01 31.1892 2017-01-01 0.0267