Year	% of total merchandise exports
1960	0.15847860538827258
1961	0.47732696897374705
1962	0.46619503269192664
1963	0.6211180124223602
1964	0.7582938388625593
1966	0.4476275738585497
1967	0.9426551453260016
1969	0.015590894917368257
1970	0.3272245928191468
1971	0.22016346039253074
1972	0.41276120044715797
1973	0.3785432764033935
1974	3.265510082937316
1975	3.83514047199398
1977	0.4713507143909264
1981	3.1178118314562804
1982	3.237105409193133
1983	11.586939691970805
1984	7.0265285806699715
1985	2.0417907411503644
1986	3.5150749871200677
1987	1.1984735369443122
1988	0.655679734343463
1989	0.5979710090028241
1990	0.5654498660264389
1994	0.062038524920192115
1995	0.07745488969849967
1996	0.00265390433559505
1997	0.2688605726437408
1998	0.5312627707396812
1999	0.18450184501845018
2000	0.07174313648713333
2001	0.16533957464377197
2002	0.07171142827395569
2003	0.04674745295065728
2004	0.05071326719842592
2005	0.11468802375099102
2006	0.1479432213695225
2007	0.3722177312639383
2008	0.346757645153019
2009	0.7345893576795683
2010	0.5927009452924946
2011	0.37847267303966525
2012	0.3952627757237409
2013	1.6535482656935658
2014	3.625263000603618
2015	1.717804228816074
2016	0.9739450506969033
2017	1.5014942478411486
2018	2.134945917556289
2019	1.9555661210726711
2020	2.6991150250502676