It should be noted that the figures for the year ending June 2022 and June 2023 is based on between approximately 25 and 40 responses and is categorised as being of limited quality.
Dylid nodi bod y ffigurau ar gyfer y flwyddyn sy'n dod i ben ym Mehefin 2022 a Mehefin 2023 yn seiliedig ar rhwng tua 25 a 40 o ymatebion ac mae'n cael ei gategoreiddio fel un o ansawdd cyfyngedig.