If you have any questions about the survey, please get in touch with the survey contractor, Verian, on 0800 008 3244 or at nationalsurveywales@veriangroup.com.
Os oes gennych unrhyw gwestiynau am yr arolwg, cysylltwch â chontractwr yr arolwg, Verian, ar 0800 136 740 neu drwy arolwgcenedlaetholcymru@veriangroup.com.