Year	% of total merchandise exports
1964	2.941176470588235
1965	1.8181818181818181
1966	0
1967	0
1968	3.7037037037037033
1969	0.06207324643078833
1970	0
1971	0
1972	0
1973	0.3361344537815144
1974	0.6766858132032417
1975	1.0127635960044397
1976	1.7495261699956262
1977	6.050871902451816
1978	8.772449180974935
1979	2.1426287176207226
1980	8.141950699084733
1981	14.874948749487496
1982	13.7405647190383
1983	7.0377184912603505
1984	12.382899805031148
1985	0
1986	0
1987	0
1988	14.256876103961647
1989	13.827732727957379
1990	13.216578714427508
1991	12.881902728545114
1992	5.699970827998014
1993	5.700011059841077
1994	23.935535218946615
1995	2.5243194202281916
1996	3.2718229777587142
1997	4.117891430898768
1998	4.388086492738196
1999	5.820627806685297
2000	0
2001	0.011720401584976612
2002	0.014914660271626084
2003	0.026605478256515776
2004	0.03256288762030522
2005	0.20115741393884803
2006	0.6311111001328249
2007	0.5747669588297966
2008	0.5259053682980127
2009	0.9008158252226972
2010	0.7643628620613953
2011	0.8557411618961637
2012	0.8176610191122582
2013	0.6944499196523841
2014	3.5747362250443517
2015	3.2995400440510254
2016	3.3461290324948614
2017	4.148519151658634
2018	4.353989947430409
2019	4.270661919412791
2020	2.836850402807678