Year	% of total merchandise exports
1960	1.1470813153199082
1961	1.6190998902305158
1966	3.187379265936896
1967	5.434181415929204
1968	7.705273296412233
1969	10.573303216091212
1970	10.204897551224388
1971	18.256472824110464
1972	10.829084719825746
1973	6.129559121424556
1974	5.625793782084805
1975	6.440314419103471
1976	4.665325053592628
1977	5.146257792847931
1978	8.577506347354696
1979	1.7738790830091462
1980	2.763479235016404
1981	3.452163468589449
1982	2.0164030993701574
1983	8.310809876414215
1984	5.178307336442576
1985	6.424035622786874
1986	10.782101426337592
1987	10.499246708061797
1988	9.23619429100237
1989	8.832208072680867
1990	8.954859722706429
1991	7.8927665788043555
1992	7.232857331934247
1993	6.40380685598042
1994	6.450305572277026
1995	4.019005264212342
1996	3.3288273004328057
1997	0.3848630600947755
1998	0.2009137475650806
1999	0.06664598718794554
2000	0
2001	0.006205767125408912
2002	0.14030036092381842
2003	2.819258288102716E-05
2004	0
2005	0.11894188964513999
2006	6.9405450626217155E-06
2007	0.13338118668233323
2008	0.0004971171722830423
2009	0.0002867108748075407
2010	0.0007750503720912278
2011	0.05573431457203702
2012	0
2013	0.035542209534675566
2014	0.7157636512190045
2015	0.061627788069650136
2016	0.04503214834201268
2017	2.5487099245691107
2018	3.0691152047643726
2019	3.71420818241606
2020	3.7142081837371754