Year Percent of GDP 2004-01-01 25.9593 2005-01-01 25.2379 2006-01-01 28.2888 2007-01-01 28.1110 2008-01-01 38.5576 2009-01-01 41.5967 2010-01-01 41.0860 2011-01-01 38.8880 2012-01-01 38.1716 2013-01-01 45.0114 2014-01-01 45.8866 2015-01-01 47.2130 2016-01-01 50.9948