The percentage of adults treated in Wales was broadly stable between 2006 and 2020, but there were clear falls in 2021 and in 2022, which are affected by the pandemic.
Roedd canran yr oedolion gafodd eu trin yng Nghymru yn sefydlog ar y cyfan rhwng 2006 a 2020, ond roedd cwymp amlwg yn 2021 ac yn 2022, oherwydd effaith y pandemig.