They have been independently reviewed by the OSR and comply with the standards of trustworthiness, quality and value in the Code of Practice for Statistics.
Maent wedi cael eu hadolygu'n annibynnol gan y OSR ac maent yn cydymffurfio â'r safonau o ran dibynadwyedd, ansawdd a gwerth yn y Cod Ymarfer ar gyfer Ystadegau.