Year	% of merchandise exports
1972	1.7023867585211108
1973	1.0399171483070535
1974	1.165067612294716
1975	5.869901207751192
1976	5.369865997374452
1983	3.891774214495066
1984	1.5503857468402822
2014	0.012848903172562178
2015	0
2017	0.056466933234308424
2018	0.143317650742994