Description of Figure 12: Line chart showing that for Newport, the population aged 18 to 21 years old has decreased due to revisions to net internal migration.
Disgrifiad o Ffigur 12: Siart linell sy'n dangos, ar gyfer Casnewydd, fod y boblogaeth 18 i 21 oed wedi gostwng o ganlyniad i ddiwygiadau i fudo mewnol net.