Year Percent of GDP 2009-01-01 0.3240 2010-01-01 2.3515 2011-01-01 7.8763 2012-01-01 19.3946 2013-01-01 28.9239 2014-01-01 33.9352 2015-01-01 41.5613 2016-01-01 49.8665