Year Percent of GDP 2004-01-01 6.88379278619211 2005-01-01 9.86482478329415 2006-01-01 10.23420525304690 2007-01-01 10.68724194997000 2008-01-01 12.72838728544760 2009-01-01 13.16528447338770 2010-01-01 14.26576752947570 2011-01-01 12.18155223050090 2012-01-01 14.97320121500340 2013-01-01 8.69147685818332 2014-01-01 17.48054233370580 2015-01-01 13.92269500608270 2016-01-01 13.70068199639720 2017-01-01 13.83164680420240 2018-01-01 15.29881310210870 2019-01-01 15.91262505344690