Year	% of GDP
2008-01-01	176.9243380506900
2009-01-01	100.4455703079550
2010-01-01	75.3534158588627
2011-01-01	78.8413155501667
2012-01-01	78.1418056137173
2013-01-01	51.5506297466870
2014-01-01	68.8363598759011
2015-01-01	63.3403934679844