Year Percent of GDP 2004-01-01 5.3879 2005-01-01 5.6476 2006-01-01 5.6859 2007-01-01 5.6567 2008-01-01 5.8106 2009-01-01 6.2382 2010-01-01 6.0547 2011-01-01 6.0730 2012-01-01 6.5056 2013-01-01 6.4611 2014-01-01 6.5884 2015-01-01 6.5729 2016-01-01 6.7172 2017-01-01 7.0387