Year	Percent of GDP
2004-01-01	15.4037
2005-01-01	16.8456
2006-01-01	16.7779
2007-01-01	20.2583
2008-01-01	25.1340
2009-01-01	24.3012
2010-01-01	24.9396
2011-01-01	25.6141
2012-01-01	26.8850
2013-01-01	29.8223
2014-01-01	32.4991
2015-01-01	35.4797
2016-01-01	34.1509
2017-01-01	35.5003