Year	% of total merchandise exports
1971	0.2322214026172718
1972	0.09810333551340746
1986	0.2845231535287553
1987	0.5288116724935666
1988	0.40182802530962514
1989	0.15418913439408194
1990	0.9964987154679658
1991	0.5778624078790783
1992	0.40825734875857644
1994	0.02325897644739142
1995	0.010692438239746416
1996	0.003351675076782275
1998	4.1095051969919405
1999	2.6086876790798494
2000	1.1405027400021233
2001	0.7920696916181245
2002	0.33893456241485453
2003	0.1063132632528288
2005	0.3262440664411958
2006	0.8883389101054215
2007	14.127883143626255
2008	18.776355086667383
2009	9.320954953855285
2010	8.292692652833782
2011	10.201812628827623
2012	13.808051918215517
2013	17.539540781623092
2014	29.119204001061235
2015	4.124364516123951
2016	10.002212335418205
2017	9.197632142149251
2018	16.61160055800643
2019	15.021732719217448
2020	14.423095413565587