Year Percentage of gross rates reduced by mandatory reliefs Percentage of gross rates reduced by discretionary reliefs Percentage of gross rates reduced by all reliefs
Blwyddyn Canran yr ardrethi gros a leihawyd gan rhyddhadau gorfodol Canran yr ardrethi gros a leihawyd gan rhyddhadau dewisol Canran yr ardrethi gros a leihawyd gan pob rhyddhad