Year	Percent of GDP
2004-01-01	3.4419
2005-01-01	6.2064
2006-01-01	6.5713
2007-01-01	8.4276
2008-01-01	7.2288
2009-01-01	9.3384
2010-01-01	9.8929
2011-01-01	12.8221
2012-01-01	16.5542
2013-01-01	17.8606
2014-01-01	17.8697
2015-01-01	17.6845