Year	Percent of GDP
2004-01-01	17.1238
2005-01-01	17.1097
2006-01-01	17.9862
2007-01-01	20.2222
2008-01-01	20.0707
2009-01-01	20.3919
2010-01-01	22.7819
2011-01-01	28.2414
2012-01-01	26.1846
2013-01-01	26.2858
2014-01-01	27.9881
2015-01-01	31.8085
2016-01-01	31.1575