Year	% of total merchandise exports
1964	2.854322612486633
1965	4.574803149606299
1966	4.471793303776181
1967	3.2869719226962544
1968	2.6476251604621313
1981	0.7777444833320675
1982	4.91481205006718
1983	6.1235904427247645
1984	6.138562417653837
1985	5.436722751227255
1986	3.516893937979695
1987	3.408138838299731
1988	1.9469605005135868
1989	1.8653008179802768
1990	1.0391090391090392
1991	2.689030598574567
1992	2.5317092812562914
1993	3.0978982300884956
1994	5.4908922506946585
1995	6.304466230936819
1996	3.723817605287839
1997	4.951906337047354
1998	6.748742186308888
1999	7.531145981930576
2000	4.6421852547972255
2001	5.059084637830411
2002	5.8547159953394035
2003	3.557133040826319
2004	6.697875408250728
2005	4.429864902021826
2006	4.382395996883958
2007	3.8916768084903817
2008	3.2241121008658378
2009	3.1525858273116087
2010	3.5368595423825964
2011	1.9737645606728218
2012	5.594229940464566
2013	3.807478911122698
2014	3.4113423741265567
2015	4.451157762222214
2016	4.194101893198772
2017	4.015845652494101
2018	8.418930483864099
2019	6.350517338749773
2020	11.317777296541383