Year Percent of GDP 2010-01-01 20.0967 2011-01-01 19.1640 2012-01-01 19.9161 2013-01-01 20.8057 2014-01-01 21.0810 2015-01-01 21.3664 2016-01-01 24.9974 2017-01-01 25.8374