Within the Mineral Fuels category, ‘Petroleum, Petroleum Products and Related Materials’ was the highest value product with £4.2bn (21.4%) of Welsh exports.
Yn y categori Tanwyddau Mwynol, 'Petroleum, Petroleum Products and Related Materials' oedd y cynnyrch gwerth uchaf gyda £4.2bn (21.4%) o allforion Cymru.