Year	Percent of GDP
2004-01-01	30.9989
2005-01-01	29.2440
2006-01-01	27.9445
2007-01-01	30.3644
2008-01-01	29.7410
2009-01-01	31.2189
2010-01-01	29.0513
2011-01-01	28.2613
2012-01-01	28.3583
2013-01-01	28.6452
2014-01-01	29.9479
2015-01-01	29.8144
2016-01-01	29.7652
2017-01-01	29.4600