Year Percent of GDP 2007-01-01 1.0789 2008-01-01 1.0253 2009-01-01 1.2089 2010-01-01 1.2425 2011-01-01 1.2437 2012-01-01 1.3081 2013-01-01 1.4651 2014-01-01 1.5714 2015-01-01 1.7308 2016-01-01 1.8646 2017-01-01 2.1172