Year	% of total merchandise exports
1970	12.5
1971	12.5
1972	5.555555555555555
1973	5.263157894736842
1974	5.263157894736842
1975	4.3478260869565215
1976	0
1977	5.555555555555555
1978	0
1979	4.166666666666666
1980	0
1981	0
1982	0
1983	3.225806451612903
1984	3.8461538461538463
1985	2.0408163265306123
1986	2.337870136532642
1987	16.029343784130912
1988	3.5024870011061715
1989	3.9878465550723408
1990	3.2942717865929887
1991	7.296803435316796
1992	4.759701641822059
1993	2.6293148611821606
1994	5.438897124686603
1995	3.4739865455655514
1996	3.629994442519407
1997	0.12930348607107367
1998	0.17759626296516937
1999	0.17697176860729202
2000	0.429774633459472
2001	0.02440316225839952
2002	0
2003	0.0014938858482255583
2004	0.0019327237157084507
2005	0.08826419186519595
2006	0.022316160815222186
2007	4.35319725078417
2008	0.782926432377479
2009	1.4832152914080137
2010	2.200909333130914
2011	0.55397015248852
2012	1.2978669317740203
2013	1.8136005359577256
2014	2.903885427080792
2015	0.2513542689321261
2016	0.6742343113243643
2017	2.4763710174028497
2018	2.0440746847432747
2019	2.67234931672035
2020	2.6135954506943397