During the early part of the pandemic the median waiting time decreased, to a low point of 2 hours in April 2020, but the median has since returned to a similar level as before the pandemic.
Yn ystod rhan gyntaf y pandemig roedd canolrif yr amser aros wedi gostwng, i 2 awr ym mis Ebrill 2020, ond ers hynny mae’r canolrif wedi dychwelyd i lefel debyg i’r hyn a welwyd cyn y pandemig.