Year Percent of GDP 2004-01-01 7.23591188248189 2005-01-01 6.89891307271071 2006-01-01 6.70565659440939 2007-01-01 6.78526169759797 2008-01-01 6.94407576541516 2009-01-01 7.16977986571156 2010-01-01 8.88201637204309 2011-01-01 10.05310020382660 2012-01-01 12.31305757727310 2013-01-01 14.89152766533470 2014-01-01 13.98997206263540 2015-01-01 12.31088381936950 2016-01-01 12.54308684602330 2017-01-01 11.72859449184450