Year	% of total merchandise exports
1961	3.608247422680412
1962	1.1363636363636365
1963	0.48192771084337355
1965	0.6437768240343348
1966	1.1627906976744187
1967	1.4644351464435146
1970	2.2407045009784734
1971	0.9894190660290976
1972	1.3454061108345554
1973	0.44911238418558597
1974	0.265472334178684
1975	0.2864028696334492
1976	0.07110650541842596
1977	0.4308840974112065
1978	1.3229704915232523
1979	0.3313665056370376
1980	0.39482280242038764
1981	0.23080662786885714
1982	0.12794367588306169
1983	0.38896104904932016
1984	0.3275159684427158
1985	1.6784761225616502
1986	1.960176992523896
1987	0.6282759919839058
1988	2.380868823326589
1989	1.324295380998518
1990	0.48900500902588917
1991	0.019210696516948733
1992	2.324327600401075
1993	0.12730888353925734
1994	0.6417400438725223
1995	0.8509357426944155
1996	0.3004175340831254
1997	0.3378337466022762
1998	0.14071551412475014
1999	0.09435049934998345
2000	0.24491206475511554
2001	0.12305840224057915
2002	0.046382651748101335
2003	0.13149737148273583
2004	0.017580373014194316
2005	0.042622530466075295
2006	0.036144442615859085
2007	0.04268879184654503
2008	0.07481228863501123
2009	0.14333112316509605
2010	0.13849003843424534
2011	0.08610685774601096
2012	1.727955454305117
2013	0.019592489983031584
2014	0.018134235248354287
2015	0.055028103502233305
2016	0.1346334589049763
2017	0.47144633541193115
2018	0.03536868746578
2019	0.08991916632292647
2020	0.051423575809486706