Year	% of total merchandise exports
1975	12.147027284641963
1976	8.322288921805567
1977	22.88955193168373
1978	21.39941410939826
1979	11.218314063941811
1980	4.779219385222257
1981	3.0740868418291534
1982	4.122623393249485
1983	5.054347826086956
1984	4.587044444935576
1985	3.722695979828314
1986	2.8973812423873433
1987	8.489826676714383
1988	15.580157149478138
1989	9.853873225447336
1990	9.182231886843017
1991	8.016571243715262
1992	5.69103623954024
1993	4.603347134463069
1994	4.947912798284391
1995	3.8982873509872915
1996	3.359329429766374
1997	3.9604032616070213
1998	4.6182859777241525
1999	5.645609586074499
2000	0.004930973385678951
2001	0.01394144688939043
2002	0
2003	0.03048498372651288
2004	0.0002494640965387222
2005	0.000310329122030168
2006	0
2007	0
2008	0
2009	0.06353012902723205
2010	0
2011	0.01261280062162151
2012	0.0031125485672985
2013	0.08636064761219425
2014	0.0038281168295686147
2015	0.006021641537169826
2016	0
2017	1.2883901045858318E-05
2018	0
2019	0
2020	0