In reply to David Williamson.
Hi Dave, at the moment they are uploaded as static pictures because the rates only change once per month (and they don't change much).
It's not very elegant: we create them in Powerpoint, copy the slide, paste it into Paint and save it as a png file. Then upload to Data Studio.
I've used a link to a Google Sheet before too, this might be a way for you to do something similar.
I hope that helps.
