This is lower than the peak seen in April to June 2021, but represents an increase of 5% compared with October to December 2019 (estimate taken as at January 2020).
Mae hyn yn is na’r uchafbwynt a welwyd yn Ebrill i Fehefin 2021, ond mae'n cynrychioli cynnydd o 5% o'i gymharu â Hydref i Ragfyr 2019 (amcangyfrifwyd ym mis Ionawr 2020).