Year Percent of GDP 2004-01-01 22.2180356694297 2005-01-01 21.2092509274607 2006-01-01 21.9007698887939 2007-01-01 30.0800503373300 2008-01-01 28.9574828334377 2009-01-01 27.0082670983528 2010-01-01 29.1837278389339 2011-01-01 26.0916797841180 2012-01-01 25.1878305780597 2013-01-01 28.2737757247065 2014-01-01 31.0271018848490 2015-01-01 29.7356833554053 2016-01-01 29.1793174317282 2017-01-01 32.9420952656790 2018-01-01 33.8817986916329 2019-01-01 33.5839516012656