The analysis is defined at the SITC2 classification level for goods, which is the most detailed level of available data for Welsh goods exports.
Mae’r dadansoddiad wedi’i ddiffinio ar lefel dosbarthiad SITC2 ar gyfer nwyddau, sef y lefel fwyaf manwl o ddata sydd ar gael ar gyfer allforion nwyddau o Gymru.