Year	Percent of GDP
2004-01-01	26.6258
2005-01-01	28.3839
2006-01-01	30.2254
2007-01-01	32.0038
2008-01-01	33.3639
2009-01-01	35.3340
2010-01-01	36.6183
2011-01-01	37.4611
2012-01-01	38.0312
2013-01-01	38.7322
2014-01-01	37.2574
2015-01-01	37.6265
2016-01-01	39.2455