Year	% of total merchandise exports
1981	0.09656237929332935
1984	0.31205346655721494
1993	2.214049843553106
2006	1.812576019372832
2007	2.9289462968209534
2008	2.8825881071271566
2009	6.169484179511856
2010	3.5566300338761505
2011	2.3784765789375446
2012	3.0836339045969776
2013	6.455527206989037
2014	0.5871188551059497
2019	0.010355110697626577
2020	0.012459523287729866