Year Percent of GDP 2004-01-01 1.150872263 2005-01-01 1.459862220 2006-01-01 1.494306596 2007-01-01 1.649519786 2008-01-01 2.081952646 2009-01-01 2.684205188 2010-01-01 3.183871459 2011-01-01 3.335787691 2012-01-01 3.696029325 2013-01-01 3.861248763 2014-01-01 3.792471286