The cost of collection has gradually increased over the past decade, from £6.3 million in 2012-13 to £7.1 million in 2022-23.
Mae cost casglu ardrethi wedi cynyddu'n raddol dros y degawd diwethaf, o £6.3 miliwn yn 2012-13 i £7.1 miliwn yn 2022-23.