Year Percent of GDP 2006-01-01 0.5668 2007-01-01 1.7228 2008-01-01 1.3522 2009-01-01 2.2190 2010-01-01 2.6200 2011-01-01 2.5865 2012-01-01 3.2753 2013-01-01 4.0899 2014-01-01 3.9830 2015-01-01 4.5041 2016-01-01 6.6559 2017-01-01 8.4730