Description of Figure 1: The percentage of adults treated in each 24-month period was stable between 2014 and 2020, before decreasing during the COVID-19 pandemic.
Disgrifiad o Ffigur 1: Roedd canran yr oedolion a gafodd eu trin ym mhob cyfnod o 24 mis yn sefydlog rhwng 2014 a 2020, cyn gostwng yn ystod pandemig COVID-19.