Year Percent of GDP 2004-01-01 0.0618 2005-01-01 0.0794 2006-01-01 0.1075 2007-01-01 0.1166 2008-01-01 0.1297 2009-01-01 0.1343 2010-01-01 0.1259 2011-01-01 0.1566 2012-01-01 0.2604 2013-01-01 0.2810 2014-01-01 0.3099 2015-01-01 0.3114 2016-01-01 0.2810 2017-01-01 0.2783