Seasonal trends in revenues are more complicated, with much of 2020-21 and 2021-22 subject to the effects of coronavirus (COVID-19) and changes to LTT rates.
Mae tueddiadau tymhorol mewn refeniw yn fwy cymhleth, gan fod effeithiau coronafirws (COVID-19) a newidiadau i gyfraddau’r Dreth Trafodiadau Tir yn berthnasol i lawer o 2020-21 ac 2021-22.