It should be noted that the figure for the year ending September 2023 is based on between approximately 25 and 40 responses and is categorised as being of limited quality.
Dylid nodi bod y ffigur ar gyfer y flwyddyn a ddaeth i ben ym mis Medi 2023 yn seiliedig ar tua 25 i 40 o ymatebion, ac mae wedi cael ei gategoreiddio fel ffigur o ansawdd cyfyngedig.