Year Percent of GDP 2004-01-01 9.3319 2005-01-01 10.5385 2006-01-01 14.2783 2007-01-01 17.3384 2008-01-01 17.4982 2009-01-01 19.6495 2010-01-01 23.2653 2011-01-01 23.2451 2012-01-01 24.2811 2013-01-01 29.5634 2014-01-01 31.7225 2015-01-01 35.7795 2016-01-01 40.2752