Year	Percent of GDP
2004-01-01	22.3116
2005-01-01	20.5982
2006-01-01	21.7440
2007-01-01	22.8402
2008-01-01	21.6097
2009-01-01	24.1596
2010-01-01	25.2953
2011-01-01	23.7957
2012-01-01	24.1033
2013-01-01	26.8998
2014-01-01	29.0510
2015-01-01	31.5477
2016-01-01	30.3586