Year	Percent of GDP
2004-01-01	16.9142
2005-01-01	16.7291
2006-01-01	17.9563
2007-01-01	19.5130
2008-01-01	20.1985
2009-01-01	21.3181
2010-01-01	21.9606
2011-01-01	22.5807
2012-01-01	23.8466
2013-01-01	27.8914
2014-01-01	28.8282
2015-01-01	26.5541
2016-01-01	31.7631