Year	Percent of GDP
2004-01-01	13.5202
2005-01-01	13.9097
2006-01-01	18.4159
2007-01-01	18.1476
2008-01-01	18.0810
2009-01-01	21.8525
2010-01-01	22.4872
2011-01-01	23.1645
2012-01-01	23.8112
2013-01-01	24.0528
2014-01-01	24.1556
2015-01-01	24.4318
2016-01-01	24.8904