Year	Percent of GDP
2004-01-01	16.6414
2005-01-01	19.5596
2006-01-01	21.7325
2007-01-01	25.1452
2008-01-01	26.2573
2009-01-01	25.4530
2010-01-01	24.9512
2011-01-01	25.5812
2012-01-01	25.9407
2013-01-01	26.4188
2014-01-01	27.2050
2015-01-01	27.2915
2016-01-01	27.5837
2017-01-01	29.4192