Year	Percent of GDP
2004-01-01	18.7007
2005-01-01	19.4591
2006-01-01	19.8498
2007-01-01	21.4387
2008-01-01	23.0244
2009-01-01	25.2687
2010-01-01	25.1023
2011-01-01	25.3209
2012-01-01	27.0872
2013-01-01	27.3723
2014-01-01	27.9319
2015-01-01	28.2812
2016-01-01	29.1003
2017-01-01	31.0348