Year	Percent of GDP
2004-01-01	22.7895
2005-01-01	20.4566
2006-01-01	21.4837
2007-01-01	22.0988
2008-01-01	28.1039
2009-01-01	29.6428
2010-01-01	29.6004
2011-01-01	30.3201
2012-01-01	31.1518
2013-01-01	31.2708
2014-01-01	31.6480
2015-01-01	33.3067
2016-01-01	35.2678
2017-01-01	36.8004