Year	% of merchandise exports
1970	1.9501145111236178
1971	2.2541438105233973
1972	2.6974279901354423
1975	0.04910345885989377
1976	0.47311094341191473
2003	3.4528690459675806
2004	0.20180739447435211
2005	0.08183739778499122
2015	9.473633435711324E-05