Year Percent of GDP 2009-01-01 2.4360 2010-01-01 4.0351 2011-01-01 10.0481 2012-01-01 18.0662 2013-01-01 19.9855 2014-01-01 16.8129 2015-01-01 21.8163 2016-01-01 24.0683 2017-01-01 28.8201 2018-01-01 31.1641 2019-01-01 33.6157