Year	Percent of GDP
2004-01-01	16.7398
2005-01-01	18.6680
2006-01-01	21.1468
2007-01-01	25.0498
2008-01-01	25.9854
2009-01-01	30.2647
2010-01-01	33.7277
2011-01-01	35.6125
2012-01-01	38.0825
2013-01-01	37.7763
2014-01-01	39.1427
2015-01-01	38.5908
2016-01-01	36.3972