Year	% of total merchandise exports
1990	25.777257202833816
1991	83.36130700843367
2005	0.013462108085812526
2006	0.5754497962607074
2007	0.4822749606309481
2008	0.22923001016028674
2009	0.02144496979406204
2010	0.00015574760244412117
2011	0.6870260390920211
2012	0.06799429553869177
2013	1.677086604432518
2014	0.036404216115349566
2015	0.7806500447733586
2016	2.7909250296022416
2017	0.4625391986900637
2020	1.3831368381201563