Year	Percent of GDP
2004-01-01	18.1629
2005-01-01	18.7258
2006-01-01	16.3405
2007-01-01	19.7710
2008-01-01	22.4111
2009-01-01	23.2470
2010-01-01	23.8216
2011-01-01	23.5736
2012-01-01	23.8832
2013-01-01	27.4819
2014-01-01	29.3743
2015-01-01	34.8226
2016-01-01	33.7797