Year	% of total merchandise exports
1960	25
1961	14.553990610328638
1962	20.35928143712575
1963	17.77777777777778
1964	13.20754716981132
1965	14.022140221402212
1966	17.226890756302517
1967	11.524163568773234
1968	9.836065573770492
1969	14.681837593801477
1970	24.397225215517242
1971	28.54252474889804
1972	21.675896403199644
1973	21.268571717836444
1974	17.749067661161426
1975	30.65859989951432
1981	26.256698144440982
1982	21.80077644525574
1983	1.0530679936378335
1984	5.888224586812372
1985	8.07052870668233
1986	8.571242000815886
1987	8.056627628069402
1988	2.1952125091532184
1989	1.2152238052149065
1990	1.333949816837118
1991	2.9741204293873444
1992	8.4465639319257
1993	13.33935100245045
1994	29.047741901561814
1995	5.9453121174867185
1996	7.125263538885458
1997	6.453160934417829
1998	4.487414277717666
1999	5.540328275818859
2000	5.494670279711972
2001	1.7229798289836147
2002	1.6611703682653953
2003	1.351400653513574
2004	0.16816180878616116
2005	0.08671249540226396
2006	0.07848313511915783
2007	0.08264229881247695
2008	0.058635925259974575
2009	0.12935088178711412
2010	0.14716132521579353
2011	0.28741795852742064
2012	0.10049438440649895
2013	0.6629988578590851
2014	0.07850102067636398
2015	0.13118640277875138
2016	0.1469117706643201
2017	0.49054000016499544
2018	0.4719087334400615
2019	0.5729109486734393
2020	0.49900479982392043