Year Percent of GDP 2004-01-01 13.9894789605031 2005-01-01 15.0746866950441 2006-01-01 14.3455091908412 2007-01-01 16.9040204548953 2008-01-01 18.6758064074116 2009-01-01 19.8002142198587 2010-01-01 22.1238250963063 2011-01-01 25.0912524951165 2012-01-01 25.7343713939224 2013-01-01 25.9538164269275 2014-01-01 24.5073521969597 2015-01-01 24.3490394292745 2016-01-01 22.9504148994752 2017-01-01 23.7277200843069 2018-01-01 24.0565011138522 2019-01-01 24.0826582839761