Year Percent of GDP 2004-01-01 0.3347 2005-01-01 0.4032 2006-01-01 0.5046 2007-01-01 0.5853 2008-01-01 0.5938 2009-01-01 0.6498 2010-01-01 0.6801 2011-01-01 0.7021 2012-01-01 0.7305 2013-01-01 0.7936 2014-01-01 0.8777 2015-01-01 0.9652 2016-01-01 1.0615