Year Percent of GDP 2004-01-01 37.4394056543612 2005-01-01 31.8241463460733 2006-01-01 14.6818359291327 2007-01-01 15.0452071627221 2008-01-01 14.3080930410299 2009-01-01 22.1933230742422 2010-01-01 21.6966792194947 2011-01-01 22.3715832693635 2012-01-01 24.9056533612847 2013-01-01 26.3394416230823 2014-01-01 29.1199324323117 2015-01-01 30.9495765496587 2016-01-01 31.2050411496094 2017-01-01 39.5340481189288 2018-01-01 42.8244643489924 2019-01-01 42.2322378028299