Year Percent of GDP 2008-01-01 3.6662 2009-01-01 3.1690 2010-01-01 4.0325 2011-01-01 3.2888 2012-01-01 3.8679 2013-01-01 4.0234 2014-01-01 4.3649 2015-01-01 5.2902 2016-01-01 5.8573