Year	Percent of GDP
2004-01-01	12.5713
2005-01-01	15.1238
2006-01-01	15.8643
2007-01-01	19.1644
2008-01-01	21.7098
2009-01-01	25.5470
2010-01-01	29.5204
2011-01-01	30.3460
2012-01-01	31.9166
2013-01-01	33.3206
2014-01-01	33.1984
2015-01-01	33.8277
2016-01-01	35.2521