Year	% of total merchandise exports
1979	2.5210531926233877
1981	2.3288232882328823
1988	1.6149381781478678
1990	0.05332704280385154
1995	0.4903973053023662
1996	0.03125811586435452
1997	1.8632240406522154
1999	1.2907429565338113
2000	0.0374746018761627
2001	2.4292665990693546E-05
2002	0.0006316998149958963
2003	0.0046390829540888835
2004	0.1515900056156714
2005	0.07882148113892079
2006	0.06154493242040615
2007	0.07205310245586029
2008	0.026667101184416373
2009	0.23132998212731315
2010	0.42970547317904206
2011	0.04312665374970263
2012	0.09124382418949063
2014	0.0003122080947233412
2015	1.9819570624457088
2016	11.646897054016463
2017	0.03904188680120636
2018	0.11476320030237117
2019	0.0989555735328008
2020	0.04330557966309031