Year	% of GDP
2010	63.76914918636
2011	56.9650495600248
2012	51.9484005688992
2013	50.9444516373408
2014	45.3097595187453
2015	47.168467694754
2016	51.9698715184826
2017	45.8843773230462
2018	47.6793879950895