New information is shown for the quarter that ended on 31 March 2023 and data for October to December 2022 has been revised.
Dangosir gwybodaeth newydd ar gyfer y chwarter a ddaeth i ben ar 31 Mawrth 2023 ac mae data ar gyfer y cyfnod o fis Hydref i fis Rhagfyr 2022 wedi'u diwygio.