Year Percent of GDP 2004-01-01 0.2146 2005-01-01 0.2377 2006-01-01 0.2019 2007-01-01 0.2135 2008-01-01 0.0097 2009-01-01 0.1797 2010-01-01 0.1738 2011-01-01 0.2843 2012-01-01 0.2990 2013-01-01 0.3002 2014-01-01 0.2302 2015-01-01 0.2805 2016-01-01 0.3194