Year	Percent of GDP
2004-01-01	17.6819
2005-01-01	17.6029
2006-01-01	16.4185
2007-01-01	16.8226
2008-01-01	17.1027
2009-01-01	18.4168
2010-01-01	18.4970
2011-01-01	18.4079
2012-01-01	19.3874
2013-01-01	21.4611
2014-01-01	21.8248
2015-01-01	23.4413
2016-01-01	23.7152