Year	Percent of GDP
2004-01-01	12.3861
2005-01-01	12.2129
2006-01-01	13.1495
2007-01-01	14.8872
2008-01-01	15.4232
2009-01-01	16.2765
2010-01-01	16.0160
2011-01-01	16.9236
2012-01-01	17.6033
2013-01-01	18.8013
2014-01-01	19.3924
2015-01-01	21.0666
2016-01-01	22.2260