Year	Percent of GDP
2004-01-01	23.7696
2005-01-01	21.1067
2006-01-01	19.5951
2007-01-01	18.9081
2008-01-01	16.5265
2009-01-01	16.3169
2010-01-01	16.6405
2011-01-01	19.8343
2012-01-01	20.9525
2013-01-01	22.5209
2014-01-01	24.9080
2015-01-01	27.2112
2016-01-01	29.8787