Year Percent of GDP 2004-01-01 0.6540 2005-01-01 0.8550 2006-01-01 0.8410 2007-01-01 0.9634 2008-01-01 1.3132 2009-01-01 1.3507 2010-01-01 1.5104 2011-01-01 1.6540 2012-01-01 2.2154 2013-01-01 2.6969 2014-01-01 2.2933 2015-01-01 2.5331 2016-01-01 2.4320 2017-01-01 3.7400