Nearly a quarter of leavers were aged between 30 and 39 (23.9%); a larger percentage than both the 40 to 49 and 60 to 69 age groups (both 18.2%).
Roedd bron i chwarter y rhai a adawodd rhwng 30 a 39 oed (23.9%); canran fwy na'r grwpiau oedran 40 i 49 a 60 i 69 (y ddau’n 18.2%).