Year	Percent of GDP
2004-01-01	12.9594
2005-01-01	13.3277
2006-01-01	13.3654
2007-01-01	14.5596
2008-01-01	16.3373
2009-01-01	18.0153
2010-01-01	17.8185
2011-01-01	18.1556
2012-01-01	19.4441
2013-01-01	19.7259
2014-01-01	20.0671
2015-01-01	20.1745
2016-01-01	20.5527
2017-01-01	21.5746