Year	% of merchandise exports
1978	11.398475808007372
2007	10.453413333357586
2009	7.360993710728795
2010	9.960333532586569
2011	9.836548086758672
2012	8.734829830366134
2013	9.607873028935431
2014	13.61842206887514
2015	12.34698993457235
2016	14.831068117115912
2017	13.560392392046774
2018	12.574050745723646
2019	14.160088443209363