Year Percent of GDP 2004-01-01 3.8220 2005-01-01 5.0771 2006-01-01 7.0240 2007-01-01 8.5759 2008-01-01 9.0801 2009-01-01 10.0270 2010-01-01 10.1018 2011-01-01 9.3355 2012-01-01 8.8695 2013-01-01 9.5019 2014-01-01 10.3750 2015-01-01 12.0646 2016-01-01 13.0435