Description of Figure 1: A line chart showing the percentage of pupils achieving the CSI at Key Stage 3 increased in every year from 2007 to 2018 but has fallen since then.
Disgrifiad o Ffigur 1: siart llinell sy'n dangos fod canran y disgyblion a gyflawnodd y DPC yng Nghyfnod Allweddol 3 wedi cynyddu ym mhob blwyddyn rhwng 2007 a 2018 ond mae wedi gostwng ers hynny.