Year	% of total merchandise exports
1965	0.1377726750861079
1966	0.046280050246911696
1981	4.029995737176891
1982	1.596068349148338
1983	1.5429518487555183
1984	2.516314391885742
1985	4.761904761904762
1986	3.4871056691691438
1987	3.3006005654348662
1988	2.306009619242462
1989	1.7385795569500226
1990	2.6931406728267566
1991	4.216944514558493
1992	5.994778223553923
1993	4.016052967630109
1994	6.19449764159269
1995	5.540294754649739
1996	6.440721450682478
1997	4.578261608621293
1998	4.431928913103008
1999	9.025610244155079
2000	5.162816165567206
2001	5.843145257855606
2002	4.061592874724071
2003	40.374186163351226
2004	12.579462934624724
2005	6.227334421501727
2006	3.4073199179655496
2007	2.8553596100371568
2008	2.5623913125482316
2009	4.223094467703037
2010	9.83525326344385
2011	6.686029761093843
2012	2.061960045957336
2013	0.7641310320992913
2014	0.3347292352345821
2015	0.1338633605005497
2016	0.02842471421063332
2017	0.03422779881700916
2018	1.0835504393411934
2019	0.09409874347035353
2020	0.0533720066283198