Year	Percent of GDP
2004-01-01	17.7764
2005-01-01	20.1353
2006-01-01	19.4209
2007-01-01	18.9144
2008-01-01	17.1259
2009-01-01	18.6859
2010-01-01	19.8354
2011-01-01	20.1189
2012-01-01	20.0011
2013-01-01	21.2190
2014-01-01	20.0339
2015-01-01	20.8940
2016-01-01	21.3157