Year	% of total merchandise exports
1981	1.7996158123829824
1982	0.08624035184508641
1983	0.08443093549417037
1984	0.10635134410193117
1985	1.0103713803168461
1986	1.053543178340208
1987	0.5103955059187629
1988	0.6063107284963567
1989	0.580669406594966
1990	22.86457247829191
1991	0.4007522657222199
1992	59.320288362512876
1993	53.01050540950191
1994	46.16680707666386
1995	30.445623005895158
1996	24.247566522897074
1997	10.612570314922266
1998	12.25010140812424
1999	14.454771274665774
2000	9.508613152041494
2001	8.07845244975983
2002	9.559100865055854
2003	8.510109160469865
2004	3.317731456539394
2005	4.816435569220106
2006	3.5099429792600367
2007	3.7494794683362525
2008	3.8710645926230463
2009	2.401374122006579
2010	2.105399722280793
2011	1.9057642283903684
2012	1.8755558893214854
2013	1.8370332962379536
2014	1.2543422001772082
2015	1.8219279003548017
2016	1.2641600598960685
2017	1.365031807832351
2018	1.538063840716361
2019	1.3412619521974412
2020	1.7257724946242015