31 Mar 2020 data: 2 out of the 404 active practices did not supply data or did not confirm their data was up-to-date in the WNWRS.
Data 31 Maw 2020: Ni wnaeth 2 o'r 404 o bractisau gweithredol gyflenwi data neu ni wnaethant gadarnhau bod eu data’n gyfredol yn WNWRS.