Year	Percent of GDP
2004-01-01	18.0196
2005-01-01	18.4017
2006-01-01	17.3914
2007-01-01	18.5466
2008-01-01	21.5708
2009-01-01	22.7499
2010-01-01	23.5510
2011-01-01	22.9208
2012-01-01	21.9642
2013-01-01	21.0813
2014-01-01	20.1047
2015-01-01	20.1837
2016-01-01	18.7773
2017-01-01	7.4352