Figure 8 shows that by mid-2021 the population aged 20 to 34 years old was reduced from 25,900 to 21,500, a decrease of 17.0%.
Mae Ffigur 8 yn dangos bod y boblogaeth 20 i 34 oed wedi gostwng o 25,900 i 21,500 erbyn canol 2021, sef gostyngiad o 17.0%.