Year	% of total merchandise exports
1979	6.642512077294686
1980	6.029705760019321
1986	0.13855054811205844
1987	0.13413715146948005
1988	0.9634101539615136
1990	0.0994256018142111
1991	0.7404636363242276
1992	0.6565588695689037
1993	1.5121592160270272
1994	2.7697130364026306
1995	1.829796308875262
1996	1.466233130537392
1997	1.8278934206850628
1998	6.5585615181222785
1999	2.2050595535114303
2000	1.3757446915281857
2001	0.09067211346492964
2002	4.735854126873391
2003	1.5472091281005487
2004	2.9020813194954354
2005	0.5353815017599912
2006	1.9653357195798096
2007	2.9426394972038494
2008	0.062312117275241406
2009	0.053324202411671816
2010	0.256725036496927
2011	1.2601616198914023
2012	1.4863803239803177
2013	0.9693888572454713
2014	0.41101727206124894
2015	7.508350638115633
2016	4.509287916427439
2017	4.245543334822001
2018	5.807129972682247
2019	4.379093588332219
2020	3.0253433077637952