Year Percent of GDP 2009-01-01 0.0524 2010-01-01 0.0294 2011-01-01 0.0468 2012-01-01 0.0259 2013-01-01 0.0431 2014-01-01 0.0272 2015-01-01 0.0425 2016-01-01 0.0377 2017-01-01 0.0451