WIMD indicators are produced using a wide range of datasets that were collected in different years (see the WIMD technical report for more detailed information).
Caiff dangosyddion MALlC eu llunio gan ddefnyddio amrywiaeth eang o setiau data a gasglwyd mewn blynyddoedd gwahanol (gweler adroddiad technegol MALlC am wybodaeth fanylach).