The number of 0 to 4 year olds in Wales has decreased by between 0.7% and 3.5% each year since 2012.
Ers 2001, mae’r gyfradd diweithdra ieuenctid wedi syrthio gan 2.2 pwynt canran yng Nghymru a 0.5 pwynt canran yn y DU.