Year Percent of GDP 2004-01-01 22.8213 2005-01-01 27.0242 2006-01-01 27.5331 2007-01-01 33.1573 2008-01-01 33.4592 2009-01-01 32.2339 2010-01-01 34.2529 2011-01-01 32.8521 2012-01-01 34.7495 2013-01-01 39.1517 2014-01-01 38.5182 2015-01-01 36.7803 2016-01-01 31.2861 2017-01-01 0.0307