Year	% of total merchandise exports
1973	2.013422818791946
1974	0.1558846453624318
1975	0.808346649121158
1981	0.0014011685745912092
1982	6.973876507124589
1987	0.022859755400617212
1989	0.002438152206200592
1990	0.0007822522607304828
1991	0.08085042671890237
2006	4.291060042247969
2009	5.245404074513676
2010	4.822209434949479
2011	4.694366274502039
2012	5.399448453544131
2013	0.03346607230139428
2014	0.02011603654122137
2015	0.000654146622692422
2016	0.0032090055033468998
2017	4.6659755629374935
2018	3.8889594198638897
2019	3.0887224565304088
2020	2.242201626866898