Between 2013/14 and 2018/19 the range of persistent absence between year groups was no greater than 5% (r), compared to over 10% in 2022/23.
Rhwng 2013/14 a 2018/19 nid oedd yr ystod o absenoldeb cyson rhwng grwpiau blwyddyn yn fwy na 5% (r), o'i gymharu â dros 10% yn 2022/23.