We published the first estimate on 25 February 2022, published the second estimate on 25 March 2022 and the third estimate on 28 April 2022.
Fe wnaethom gyhoeddi’r amcangyfrif cyntaf ar 25 Chwefror 2022, yr ail amcangyfrif ar 25 Mawrth 2022 a'r trydydd amcangyfrif ar 28 Ebrill 2022.