The levels of relieved and discounted waste can vary greatly over time and therefore, could increase from these lower levels in future periods.
Gall lefelau gwastraff wedi’i ryddhau a’i ddisgowntio amrywio'n fawr dros amser ac felly, gallent gynyddu o'r lefelau is hyn mewn cyfnodau yn y dyfodol.