Year	Percent of GDP
2004-01-01	33.8555
2005-01-01	36.7618
2006-01-01	38.8469
2007-01-01	40.4226
2008-01-01	42.8208
2009-01-01	44.4256
2010-01-01	45.3225
2011-01-01	46.3298
2012-01-01	47.2880
2013-01-01	47.7394
2014-01-01	47.8220
2015-01-01	48.7882
2016-01-01	49.7338
2017-01-01	50.8262