Year	% of total merchandise exports
1981	0.18198362147443162
1982	0.06468026388203613
1983	0.05628729032738305
1984	0.07090089606795409
1985	0.07529650668263
1986	0.15026680987948163
1987	0.4020416620013504
1988	0.3115319993299236
1989	0.5655568870768053
1990	1.7707997512980447
1991	0.3767397527735731
1992	0.18022657054582905
1993	0.3501803167302566
1994	0.5616399887672002
1995	0.016903670209394216
1996	0.0754201136015461
1997	0.05979536696638171
1998	0.0695369994784725
1999	0.29026766027519607
2000	0.16982943301958267
2001	0.02685080200317958
2002	0.029501702272616243
2003	0.046481800962813805
2004	0.09901113611658167
2005	0.02904312006826247
2006	0.11506664892830816
2007	0.13023526092411647
2008	0.05079973410442812
2009	0.07275960296770154
2010	0.002688642969423805
2011	0.00339208097944159
2012	0.005957080294692503
2013	0.02221885181174311
2014	0.05534619598990955
2015	0.08236696506548188
2016	0.04760174692921986
2017	0.03288847595959892
2018	0.015214857035110394
2019	0.015148297631753797
2020	0.012781626806252945