Year Percent of GDP 2004-01-01 2.7302 2005-01-01 2.1729 2006-01-01 2.4607 2007-01-01 2.9354 2008-01-01 4.3409 2009-01-01 6.0919 2010-01-01 6.9516 2011-01-01 6.9800 2012-01-01 5.3057 2013-01-01 7.5026 2014-01-01 9.1574 2015-01-01 15.4055 2016-01-01 19.0444