For the weight of soils and stones disposed at the lower rate of tax, there was a 18% decrease from the same quarter a year earlier, also to 37 thousand tonnes.
Ar gyfer pwysau priddoedd a cherrig a waredwyd ar y gyfradd dreth is, bu cynnydd o 18% o'r un chwarter flwyddyn ynghynt, hefyd i 37 mil o dunelli.