Year Percent of GDP 2004-01-01 53.7951422730360 2005-01-01 48.3430181104348 2006-01-01 43.9750544882108 2007-01-01 38.3723771219044 2008-01-01 41.4690127040939 2009-01-01 41.0947786659835 2010-01-01 44.4031655799317 2011-01-01 43.0494327722116 2012-01-01 43.8799947757646 2013-01-01 43.9596672847094 2014-01-01 48.5617167301078 2015-01-01 51.4461525908761 2016-01-01 53.2019003029405 2017-01-01 54.2172479303131 2018-01-01 56.1008387042014 2019-01-01 55.3812363751565