Year Percent of GDP 2004-01-01 2.5505 2005-01-01 1.7331 2006-01-01 1.9056 2007-01-01 1.8103 2008-01-01 1.1711 2009-01-01 1.8500 2010-01-01 2.3837 2011-01-01 2.9285 2012-01-01 3.5789 2013-01-01 3.7669 2014-01-01 3.8551 2015-01-01 4.9867 2016-01-01 5.5451