Year Percent of GDP 2004-01-01 3.3619 2005-01-01 2.7454 2006-01-01 2.3187 2007-01-01 2.5036 2008-01-01 3.5348 2009-01-01 5.1629 2010-01-01 5.7439 2011-01-01 6.8367 2012-01-01 9.4649 2013-01-01 11.1969 2014-01-01 14.2322 2015-01-01 22.3128