The "Medium" category follows a similar trend, with Primary Cluster 2 (23.9%) again outpacing Primary Cluster 1 (14.7%).
Mae’r categori ‘Canolig’ yn dilyn tuedd debyg ac, unwaith eto, mae canran uwch (23.9%) ym Mhrif Glwstwr 2 na Phrif Glwstwr 1 (14.7%).