Year	% of total merchandise exports
1960	3.818953323903819
1961	13.956639566395665
1962	12.751677852348994
1963	7.642487046632124
1964	6.712962962962964
1965	2.7939464493597206
1966	2.029312288613303
1967	10.085836909871244
1968	11.568627450980392
1969	6.302038183174405
1970	7.048547475141353
1971	9.86758557180308
1972	11.242705001813444
1973	9.074925031821026
1974	12.630274501413071
1975	34.355632276560634
1976	14.721675834433585
1977	4.919599198396794
1978	5.269625739469704
1979	4.059257940632109
1980	11.607670187112332
1981	19.38835102655281
1982	21.597170659267654
1983	10.691736770832973
1984	5.125282275129823
1985	7.2914429536523055
1986	4.021369469469141
1987	4.311204807259413
1988	6.650932445092388
1989	7.507592126119985
1990	2.0765019510225318
1991	8.764866479714115
1992	8.496658377827039
1993	6.263546982003885
1994	4.065921498429663
1995	5.8630745737398255
1996	8.116969976969639
1997	7.177575228789728
1998	8.216474787697873
1999	11.184331659081584
2000	4.959646323135313
2001	0.06610911401322733
2002	0.06805456805205994
2003	0.05661639182942818
2004	0.05511166299996135
2005	4.098726128672924
2006	20.03471635532293
2007	14.372415262614519
2008	7.992520433434683
2009	8.329311546470352
2010	0.18988030868328196
2011	0.22359190563059458
2012	0.3001615096744099
2013	0.24609592521815665
2014	0.08604499249542134
2015	0.08475795720802397
2016	0.08325004125523972
2017	0.07831312978548645
2018	0.38706015323208803
2019	2.168110117679496
2020	0.020769011579262