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.
Cyswllt: Chris Payne
Dyddiad y datganiad: 19 January 2022
View previous versions
Cyhoeddiad nesaf: 16 February 2022
ID y gyfres: D7OE
Beth yw hyn?
Custom time period
Download full time series as:
Download filtered time series as: