Prior to the COVID-19 pandemic, performance against both referral to treatment targets was fairly stable between 2016 and early 2019, but had been deteriorating since mid-2019.
Er bod y perfformiad o fis i fis yn erbyn y ddau darged yn gallu amrywio’n sylweddol, roedd y perfformiad wedi aros yn weddol sefydlog rhwng dechrau 2016 a chanol 2019.