Year Percent of GDP 2004-01-01 292.0751 2005-01-01 286.3347 2006-01-01 314.3197 2007-01-01 353.6944 2008-01-01 352.9528 2009-01-01 383.1659 2010-01-01 385.2760 2011-01-01 391.2114 2012-01-01 406.2741 2013-01-01 427.9860 2014-01-01 444.1857 2015-01-01 446.9372 2016-01-01 469.2602