Year Percent of GDP 2004-01-01 7.14168661035126 2005-01-01 8.73936672612532 2006-01-01 8.50579024395174 2007-01-01 9.14410611641483 2008-01-01 10.92961984428440 2009-01-01 14.79778032714690 2010-01-01 17.49028957508300 2011-01-01 17.78894936691540 2012-01-01 20.60831935425080 2013-01-01 21.73426361773280 2014-01-01 22.82277475606110 2015-01-01 25.97417115511000 2016-01-01 26.61368159306020 2017-01-01 27.20401272391430