Year Percent of GDP 2004-01-01 3.2461 2005-01-01 3.1080 2006-01-01 4.1502 2007-01-01 5.8434 2008-01-01 5.8172 2009-01-01 6.5417 2010-01-01 6.3601 2011-01-01 6.3649 2012-01-01 7.8852 2013-01-01 10.6815 2014-01-01 13.1017 2015-01-01 15.4167 2016-01-01 9.7009