Year	Percent of GDP
2004-01-01	16.1942
2005-01-01	18.5299
2006-01-01	20.2571
2007-01-01	19.5325
2008-01-01	21.2100
2009-01-01	25.7352
2010-01-01	26.1444
2011-01-01	24.7379
2012-01-01	24.6779
2013-01-01	25.0472
2014-01-01	25.9974
2015-01-01	27.2175
2016-01-01	28.3391