Year	% of total merchandise exports
1964	1.5053055852595212
1965	1.7952755905511812
1966	2.140345512918514
1967	1.5731624733031202
1968	0.7327770646127514
1981	0.0366864920838901
1982	4.583775745920617
1983	5.660628996868853
1984	5.630012479262268
1985	4.694827758446652
1986	2.1237128241994028
1987	1.751153544911941
1988	0.5378653469044729
1989	0.7185994954514181
1990	0.21652421652421655
1991	0.10663951556722576
1992	0.18924904368834305
1993	0.30420353982300885
1994	0.4029021302871256
1995	1.1971677559912854
1996	0.1848957170291635
1997	0.2703908426183844
2000	2.153907375670754
2001	1.9356996491355594
2002	2.5294917983295524
2003	0.9285546539155207
2004	2.180263222438529
2005	1.3546082403775535
2006	1.4923082784342439
2007	1.6850482688990702
2008	1.3688560034899049
2009	1.1965027265263977
2010	1.7112942385731011
2011	0.4408551967610178
2012	0.340883025816294
2013	0.2696816061772763
2014	0.3536126215945582
2015	0.8944757172178729
2016	0.6013591223953815
2017	0.37712841237424943
2018	0.2770025960503703
2019	0.6254745249765412
2020	1.053356940998338