These drops were influenced by temporary stops on collection of post, and in the case of February, some further issues related to the most recent lockdown over Christmas 2021 and January 2022.
Dylanwadwyd ar y diferion hyn gan oedi dros dro wrth gasglu post, ac yn achos mis Chwefror, roedd rhai materion pellach yn ymwneud â'r cyfnod clo diweddaraf dros Nadolig 2021 ac Ionawr 2022.