Year	% of total merchandise exports
1981	2.4871094925213284
1982	6.812987807835687
1983	-9.200718456925976E-09
1984	20.076964899868713
1985	35.06263396577395
1986	35.00591894758109
1987	36.92980590489442
1988	32.758401122924965
1989	28.462755540019856
1990	13.271174044734135
1991	14.163568705901708
1992	2.291452111225541
1993	0.7526263523754769
1994	0.5897219882055602
1995	0.4627379719821666
1996	0.544438945061161
1997	0
1998	0
1999	0
2000	0
2001	0.016251765903633454
2002	-1.1623196204754047E-14
2003	0
2004	0
2005	1.1312155778343554E-14
2006	-7.732146504068027E-15
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	-1.1171620796262981E-14
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0