We published the first estimate on 27 April 2023, published the second estimate on 19 May 2023 and the third estimate on 23 June 2023.
Fe wnaethom gyhoeddi’r amcangyfrif cyntaf ar 27 Ebrill 2023, yr ail amcangyfrif ar 19 Mai 2023 a'r trydydd amcangyfrif ar 23 Mehefin 2023.