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