Data is sourced from a modelling and forecasting tool which extracts detailed information on CTRS cases from the core revenue and benefits systems of Welsh local authorities.
Daw'r data o offeryn modelu a rhagamcanu sy'n tynnu allan gwybodaeth fanwl am achosion Cynllun Gostyngiadau’r Dreth Gyngor o systemau refeniw a budd-daliadau craidd awdurdodau lleol Cymru.