Year	Percent of GDP
2004-01-01	3.6006
2005-01-01	6.3255
2006-01-01	9.3761
2007-01-01	11.9378
2008-01-01	17.9632
2009-01-01	21.2981
2010-01-01	20.8756
2011-01-01	20.1736
2012-01-01	18.1141
2013-01-01	18.3405
2014-01-01	19.0167
2015-01-01	19.3006
2016-01-01	19.2938
2017-01-01	20.4442