Year	Percent of GDP
2004-01-01	20.3780
2005-01-01	21.2650
2006-01-01	21.6191
2007-01-01	21.6969
2008-01-01	22.5952
2009-01-01	23.8879
2010-01-01	24.5511
2011-01-01	26.8868
2012-01-01	29.5918
2013-01-01	32.3205
2014-01-01	33.6883
2015-01-01	34.7186
2016-01-01	34.3208