Year	% of total merchandise exports
1960	0
1961	0
1962	9.027777777777771
1963	0
1964	1.8867924528301887
1965	3.5714285714285756
1966	2.0114942528735633
1967	0
1968	2.1278070418630475
1969	1.9982766402691723
1970	2.4446479896402513
1971	6.232427366447985
1972	6.981424720262927
1973	0.9255397645247184
1974	0.775708379167773
1975	7.684636207217771
1976	0.29045829527930406
1977	11.030400358530027
1978	1.7344459477647358
1979	0.6505365088839101
1980	1.815505137605934
1981	2.8322041271659866
1982	1.4412189833774993
1983	3.005423345478148
1984	5.84192265935305
1985	0.5520233939519965
1986	0.5216836157610014
1987	1.034486436412043
1988	0.4933617169840845
1989	0.51087376681859
1990	0.6095738023511594
1991	0.3688765053346079
1992	0.2481354786391885
1993	0.6236108844480832
1994	0.05368303316075818
1995	0.09976725840112657
1996	0.24321144833721048
1997	0.019604200252501307
1998	-1.2298613516911617E-08
1999	0.0081804283609922
2000	0.0416116871070632
2001	0.0753280698073461
2002	0.035892477819511125
2003	0.04939697815386708
2004	0.024779914688535916
2005	0.01921905571624808
2006	0.03367403769655797
2007	0.005299053897776532
2008	0.01552247991023174
2009	0.015975728316985946
2010	0.023630657614387533
2011	0.008449542174209238
2012	0.005773931844422996
2013	0.004171158375472133
2014	0.14227922663646778
2015	0.005082773425449649
2016	0.0034807777438694734
2017	8.553784141320646E-05
2018	3.2725998709721255E-05
2019	3.393134990718483E-05
2020	1.2111118425636959E-05