Renewal area expenditure has steadily decreased in the past 10 years, from £33.6 million in 2012-13 to £2,000 in 2023-24.
Mae cost casglu ardrethi wedi cynyddu'n raddol dros y degawd diwethaf, o £6.4 miliwn yn 2013-14 i £7.2 miliwn yn 2023-24.