Year Percent of GDP 2004-01-01 5.84381217700743 2005-01-01 7.88258538818621 2006-01-01 8.41079211110003 2007-01-01 9.37205755932159 2008-01-01 9.37571806636464 2009-01-01 11.12604365854490 2010-01-01 12.80628373287790 2011-01-01 14.06660827440910 2012-01-01 18.30953745601420 2013-01-01 17.97004599886430 2014-01-01 17.42500424038280 2015-01-01 17.03262097754070 2016-01-01 17.01856658336920 2017-01-01 17.70625875753100