It applies to data relating to 1 April 2023 to 31 March 2024, collected in financial year 1 April 2024 to 31 March 2025.
Mae'n berthnasol i ddata o 1 Ebrill 2023 i 31 Mawrth 2024, a gasglwyd ym mlwyddyn ariannol 1 Ebrill 2024 hyd 31 Mawrth 2025.