Year	Percent of GDP
2004-01-01	147.0702
2005-01-01	147.6181
2006-01-01	146.0539
2007-01-01	147.9260
2008-01-01	145.8014
2009-01-01	153.7688
2010-01-01	151.8934
2011-01-01	154.2717
2012-01-01	160.3991
2013-01-01	164.6869
2014-01-01	166.5870
2015-01-01	167.7877
2016-01-01	171.4399