Year Percent of GDP 2007-01-01 0.0000 2008-01-01 0.0000 2009-01-01 0.0014 2010-01-01 0.0024 2011-01-01 0.0033 2012-01-01 0.0000 2013-01-01 0.0003 2014-01-01 0.0001 2015-01-01 0.0000 2016-01-01 0.0050 2017-01-01 0.0000