Year	% of total merchandise exports
1962	0
1963	1.0416666666666665
1964	0.6369426751592357
1965	0.5405405405405406
1966	0
1967	1.1068943706514864
1968	3.094815690912675
1969	2.2339027595269383
1970	1.257353789364402
1971	0.3048780487804878
1972	0.3495383181381259
1973	1.7726011364279803
1974	0.4647973178908869
1975	1.520533582104428
1976	0.840170440304119
1977	2.6544682782606563
1978	1.4506026460823915
1979	1.201164701716931
1980	5.040638282007307
1981	0.8581737748880183
1982	1.675951656007765
1983	1.3009330534760841
1984	1.93212737545161
1985	1.5191896237571423
1986	0.5878758109573211
1987	0.5584294624965224
1988	0.847038649807893
1989	1.1426563088420971
1990	1.2826236672602802
1991	0.9559610402797285
1992	0.8977859030548855
1993	4.1773317313405585
1994	2.4480421069966374
1995	3.363647718950094
1996	4.412681164164392
1997	0.8887516726877112
1998	1.8049789112950683
1999	0.23516323173364342
2000	5.402676201652799
2001	0.1816908071737763
2002	0.16591462411706634
2003	0.19866793196416285
2004	0.08171257046467588
2005	0.01232978479430446
2006	0.09376260575116341
2007	0.1454897113413857
2008	0.12888455251551867
2009	0.4011422340385785
2010	0.07773777831416018
2011	0.003097618402167183
2012	0.00242643873008906
2013	0.036309116708504514
2014	0.0008625902571321482
2015	0.0041614034462801016
2016	0.004356062975241546
2017	2.414107249417152
2018	0.6338415684360766
2019	0.31784144468701503
2020	0.20430298719103443