Due to the coronavirus (COVID-19) pandemic, quarterly data for January to March of 2020 and annual data for 2019-20 was not published.
Oherwydd pandemig y coronafeirws (COVID-19), ni chyhoeddwyd data chwarterol ar gyfer mis Ionawr i Mawrth 2020 a data blynyddol ar gyfer 2019-20.