18% indicated that they had experienced this over the past 12 months but that increased to 29% of those questioned between the ages of 16 and 34.
Nododd 18% eu bod wedi profi hyn dros y 12 mis diwethaf ond roedd hynny yn cynyddu i 29% o’r rheiny a holwyd rhwng 16 a 34 oed.