The population of Wales is estimated to have decreased slightly in the period between Census Day (21 March) and 30 June, by around 2,000 people.
Amcangyfrifir bod poblogaeth Cymru wedi gostwng ychydig yn y cyfnod rhwng 21 Mawrth a 30 Mehefin, tua 2,000 o bobl yn llai.