Year	% of GDP
1998	6.773109306339569
1999	7.589582421470231
2009	15.665867980767587
2010	14.130491536260385
2012	11.635247377061757
2013	11.519019901887741
2014	11.431860029685513
2015	10.711725274440722
2016	9.72624152630822