During the early parts of the COVID-19 pandemic the median waiting times for all age groups fell but have since returned to pre-pandemic levels.
Yn ystod cyfnod cynnar pandemig COVID-19, disgynnodd canolrif yr amser aros ar gyfer pob grŵp oedran, ond ers hynny maent wedi dychwelyd i lefelau cyn y pandemig.