[Note 2] We have made statistical corrections to the data in this table to exclude certain taxpayer amendments, where the validity of those amendments is being investigated.
[Nodyn 2] Rydym wedi gwneud cywiriadau ystadegol i’r data yn y tabl hwn i eithrio rhai newidiadau gan drethdalwyr, lle mae dilysrwydd y newidiadau hynny’n cael ei ymchwilio.