Year	Percent of GDP
2004-01-01	18.1688
2005-01-01	20.3719
2006-01-01	21.4889
2007-01-01	23.3325
2008-01-01	24.3309
2009-01-01	30.1725
2010-01-01	31.8858
2011-01-01	31.1947
2012-01-01	36.4054
2013-01-01	37.6007
2014-01-01	41.7756
2015-01-01	48.1270
2016-01-01	44.4842
2017-01-01	47.5734