The percentage of adults treated in Wales was fairly stable between 2006 and 2020, but there was a clear fall in 2021, due to the effects of the pandemic.
Roedd canran yr oedolion a gafodd driniaeth yng Nghymru yn weddol sefydlog rhwng 2006 a 2020, ond roedd gostyngiad amlwg yn 2021 oherwydd effeithiau’r pandemig.