We use this information to make the website work as well as possible and improve our services.
You’ve accepted all cookies. You can change your cookie settings at any time.
Data a dadansoddiadau o Gyfrifiad 2021
Cyswllt: Dave Sweet
Dyddiad y datganiad: 6 December 2022
View previous versions
Cyhoeddiad nesaf: 7 March 2023
ID y gyfres: HCM8
Beth yw hyn?
Custom time period
Download full time series as:
Download filtered time series as: