Year Percent of GDP 2004-01-01 17.32007682648590 2005-01-01 16.20765342099770 2006-01-01 15.30773341476450 2007-01-01 13.19519557588410 2008-01-01 11.21869443533130 2009-01-01 14.16535886520430 2010-01-01 15.08598139283200 2011-01-01 14.72252305473220 2012-01-01 14.29084013752320 2013-01-01 15.35534021328500 2014-01-01 15.85534021328500 2015-01-01 11.00000000000000 2016-01-01 8.99999999999999 2017-01-01 7.00000000000001 2018-01-01 6.00000000000000 2019-01-01 5.00000000000000