Year	% of total merchandise exports
1981	0.013152542774456724
1982	0.004880412050496364
1985	0.005756012508552106
1986	0.0020689211652425814
1988	0.06001174771969836
1989	0.3297446804150581
1990	0.6078189614315906
1991	4.393633316803103
1992	4.417206933818463
1993	6.229733835103031
1994	5.534815369302022
1995	8.698408197522612
1996	0.5780784013645119
2000	0.01584988143245035
2001	0.0016685677897484736
2002	0.08550569872714463
2003	0.30527330838852024
2004	2.3609871245018677
2005	0.11120870477307424
2006	0.27505745549834343
2007	0.0005484363886084566
2008	0.014919769543898622
2009	0.03581864547915399
2010	0.06510012517682552
2011	0.04568569213989781
2012	0.2008055241512156
2013	0.05681595837144063
2014	0.0190270105025056
2015	0.011375871885220932
2016	0.006169271355648258
2017	0.42800610002656314
2018	0.0859458412514428
2019	0.007781540189934822
2020	0.33457445907662664