Year Percent of GDP 2004-01-01 0.0312 2005-01-01 0.0797 2006-01-01 0.1005 2007-01-01 0.1553 2008-01-01 0.1240 2009-01-01 0.1191 2010-01-01 0.1294 2011-01-01 0.1263 2012-01-01 0.1360 2013-01-01 0.1582 2014-01-01 0.1740 2015-01-01 0.1746 2016-01-01 0.2246 2017-01-01 0.3093