Year	% of total merchandise exports
1960	1.8851756640959727
1961	1.0906040268456376
1962	0.586940572267058
1963	1.2337662337662338
1964	1.347557551937114
1965	1.3269639065817411
1966	0.8328995314940135
1967	0.6769825918762089
1968	2.3266856600189936
1969	0.7305505202254725
1970	4.13956914947668
1971	7.234690586328394
1972	11.044455565977389
1973	4.30420585744216
1974	5.6675084757489795
1975	2.636691214075847
1976	3.5400759519313354
1977	2.6088965322518547
1978	2.860364151967886
1979	1.9646323670648624
1980	2.480480082069144
1981	23.15274461209332
1982	0.8626839851596624
1983	2.6900004181837067
1984	6.2807722162684945
1985	2.908081358528359
1986	3.069028644539571
1987	2.975120741064146
1988	0.6018796253890698
1989	1.6264411249216122
1990	3.760365035787831
1991	3.3335086303459596
1992	6.14532619483156
1993	6.33095385902007
1994	5.1951857230461815
1995	6.045442674835408
1996	6.753921617286562
1997	0.3040724262824397
1998	0.3817322457606037
1999	0.6632337393468203
2000	0.13404964748206233
2001	0.32224114463714637
2002	0.44911188826506737
2003	0.27799825588825666
2004	0.27954865722538597
2005	0.15851747600712887
2006	0.13468136654867854
2007	0.15553912117746116
2008	0.20128628848741636
2009	0.32817654247129985
2010	0.29514155096185346
2011	0.23482840036177494
2012	0.24081373821508975
2013	0.24940833384874014
2014	0.2525408845220217
2015	0.5403803674539948
2016	0.23008546848623515
2017	0.3226899657994922
2018	0.069120779979128
2019	0.0398763216528414
2020	0.02186019509676325