Respondents were asked to allocate trade based on their immediate partner in the supply chain, not the original source or final destination of a purchase or sale.
Gofynnwyd i ymatebwyr ddyrannu masnach ar sail eu partner uniongyrchol yn y gadwyn gyflenwi, nid ffynhonnell wreiddiol neu gyrchfan derfynol pryniant neu werthiant.