Year Percent of GDP 2004-01-01 5.3363 2005-01-01 3.8532 2006-01-01 3.5847 2007-01-01 4.7604 2008-01-01 5.6392 2009-01-01 7.6955 2010-01-01 6.3270 2011-01-01 5.5264 2012-01-01 5.8962 2013-01-01 6.5110 2014-01-01 6.4880 2015-01-01 8.2394 2016-01-01 8.5981 2017-01-01 8.3731