Year Percent of GDP 2004-01-01 0.1946 2005-01-01 0.2162 2006-01-01 0.1957 2007-01-01 0.2380 2008-01-01 0.3070 2009-01-01 0.2987 2010-01-01 0.3153 2011-01-01 0.2703 2012-01-01 0.2370 2013-01-01 0.2138 2014-01-01 0.1947 2015-01-01 0.1538