Year	Percent of GDP
2004-01-01	15.0980
2005-01-01	16.0680
2006-01-01	17.3238
2007-01-01	19.9407
2008-01-01	21.3478
2009-01-01	23.0193
2010-01-01	24.5425
2011-01-01	25.7752
2012-01-01	24.3622
2013-01-01	26.2712
2014-01-01	27.8454
2015-01-01	26.1482
2016-01-01	28.2776