The Code of Practice for Statistics requires the release of data at a level of aggregation that is sufficient to ensure that the results are adequately robust and so 'fit for purpose'.
Mae’r Cod Ymarfer ar gyfer Ystadegau yn gofyn am ryddhau data ar lefel o gydgasglu sy’n ddigonol i sicrhau bod y canlyniadau’n ddigon cadarn ac felly’n 'addas i’r diben'.