As of the 31 December 2021 reference period the experimental label was removed as the statistics were deemed to be robust and reliable, following quality assessments.
O gyfnod cyfeirio 31 Rhagfyr 2021, cafodd y label arbrofol ei ddileu oherwydd ystyriwyd bod yr ystadegau yn ddigon cadarn a dibynadwy, ar ôl cynnal asesiadau ansawdd.