Year	% of total merchandise exports
1965	0.11507479861910241
1981	2.2988505746399786
1982	8.545420768824416
1983	10.346848481780183
1984	0.22946472792541273
1985	1.1515792355594312
1986	0.734629313010455
1987	45.38768025580745
1988	0.38130453901997247
1989	0.028102677475348708
1990	0.11200750100299466
1991	5.344054411572268
1992	1.4641864502936401
1993	0.9899645531265078
1994	2.408805871842286
1995	3.4219345443217932
1996	1.9423277334714464
1997	0.009587421303250136
1998	0.006427423674343867
1999	0.013460761879122358
2000	0.011693083601885878
2001	0.02244083740983985
2002	0.12742699570487956
2003	0.0713154662160079
2004	0.07385649573806558
2005	0.06288903464323775
2006	0.07944491639378658
2007	0.11859176708728127
2008	0.1689517321486653
2009	0.1485028079405587
2010	0.30265208039365993
2011	0.3669240805380573
2012	0.43366821789459764
2013	0.45827768260974955
2014	0.7085682283520318
2015	0.807374263195164
2016	0.791147597606924
2017	0.6860374822227342
2018	0.49302746269168374
2019	0.4221934510201581
2020	0.496517742549896