Year Percent of GDP 2004-01-01 1.7437 2005-01-01 1.9703 2006-01-01 1.8266 2007-01-01 2.3462 2008-01-01 2.2754 2009-01-01 2.4410 2010-01-01 2.5372 2011-01-01 2.5097 2012-01-01 2.4244 2013-01-01 2.3324 2014-01-01 2.7394 2015-01-01 2.8186 2016-01-01 2.8082 2017-01-01 6.2739