For information: Group A Population 200,000 and above; Group B Population 100,001 to 199,999; Group C Population up to 100,000.
Er gwybodaeth: Poblogaeth Grŵp A 200,000 ac uwch; Poblogaeth Grŵp B 100,001 i 199,999; Poblogaeth Grŵp C hyd at 100,000.