Year Percent of GDP 2004-01-01 61.5646 2005-01-01 67.1989 2006-01-01 72.0340 2007-01-01 79.5341 2008-01-01 79.8224 2009-01-01 83.5298 2010-01-01 82.5240 2011-01-01 82.5835 2012-01-01 82.1625 2013-01-01 80.4359 2014-01-01 83.3358 2015-01-01 83.4104 2016-01-01 85.8440 2017-01-01 90.6013