Year Percent of GDP 2007-01-01 0.0000 2008-01-01 0.0000 2009-01-01 0.0000 2010-01-01 0.0010 2011-01-01 0.0010 2012-01-01 0.0010 2013-01-01 0.0159 2014-01-01 0.0197 2015-01-01 0.0180 2016-01-01 0.0208 2017-01-01 0.0083