Year	% of GDP
2009	3.8344375290741293
2010	4.093091546665395
2011	3.66683814228972
2012	3.5768327868829344
2013	3.7394304559400307
2014	3.031077446492353
2015	3.4002484459542917
2016	3.4277077786166013
2017	4.192638570831608