Year	% of total merchandise exports
1973	0.5938723174517478
1975	1.577730051214274
1976	0.3451792578645956
1977	3.435114503816794
1978	0.6667056553014796
1979	1.1524454893283549
1991	0.006914545316400977
1992	0.0926018456230613
1994	0.06143146877067027
1996	0.006435739601039229
2000	0.023966894072095634
2001	0.04024821615373024
2002	0.00033079639231449714
2003	0.06713675385438586
2004	0.11127701810434593
2005	0.12773955516602614
2006	0.23967599331348052
2007	0.27213533884311303
2008	0.1666515317587891
2009	0.3075192575217032
2010	2.4406260734271488
2011	2.3052894615972637
2012	2.6138465048019084
2013	0.6603201897874674
2014	0.3010596323154669
2015	2.3847665108650604
2016	2.32667707260771
2017	0.8177410219885137
2018	0.058814885789584846
2019	0.32748418924958517
2020	0.11580918570592538