Year	% of total merchandise exports
1974	0.11976422885143756
1976	0.6198851234164903
1977	0.22763165060175353
1979	0.023076362517509694
1981	0.10095407401906292
1988	0.20397722502468033
1989	0.20397722504332674
1991	0.5731938527251015
1993	0.01188689256392538
1994	0.053385161145568814
1995	0.22936647501465598
1996	0.16918098072933516
1997	0.27375996739745384
1998	0.5124819385992406
1999	0.1771217273590829
2000	1.7765892270571042
2001	0.5956850123909367
2002	0.5431832651359922
2003	0.500233165009068
2004	0.5665525451040501
2005	0.9272020096409798
2006	0.6226324375353525
2007	1.1894123415128606
2008	0.701044902244811
2009	0.3510829135664373
2010	0.6766559966607646
2011	0.6722346641652215
2012	3.0279161828544594
2013	2.5436388796638285
2014	1.2369325936110491
2015	0.9380653419767937
2016	1.3783000103180858
2017	3.7875610035852962
2018	3.4255783586882957
2019	3.16885470706598
2020	3.6438553396371858