Throughout 2022 the number increased, though at a slower rate, but it has since fallen and stabilised, though well above pre-pandemic levels.
Drwy gydol 2022, cynyddodd y nifer, ond ar gyfradd arafach, ond ers hynny mae wedi gostwng a sefydlogi, er ei fod llawer uwch na’r lefelau cyn y pandemig.