Year	% of total merchandise exports
1964	18.367346938775512
1970	0.05820721769499418
1981	0.01203876482369929
1982	5.2232360782366785
1983	1.1475968643045786
1984	11.661341854794943
1985	3.5055661523934725
1986	3.1332575170024053
1987	1.9275624680042118
1988	1.3427419023207414
1989	30.013261247705568
1990	2.2663730187747806
1991	4.7134510908121925
1992	0.48117824817586907
1993	3.076923076923077
1994	0.3328894806924101
1995	0.35347043701799485
1996	0.1559089491736826
1997	0.010410702201863516
1998	0.3454546288516183
1999	0.5716590193793598
2000	0.8488320725360506
2001	0.8196322647546824
2002	1.0692431417643269
2003	0.4599204721503072
2004	0.6115742777180488
2005	0.5018877668114892
2006	0.4178811510636957
2007	0.4964482721174503
2008	0.4454380742344522
2009	0.28797137891922436
2010	1.184893445556851
2011	2.6315208925137257
2012	4.727106934248553
2013	3.2945696865472387
2014	1.58089540351386
2015	4.084318331517077
2016	4.877881781415867
2017	5.312352007604481
2018	1.616678194017589
2019	1.6811753670106229
2020	1.4031887780288375