The most common reason for sessions missed during the week of 13 December to 17 December 2021 was illness (code “I”), with 6.2% of sessions missed for this reason.
Y rheswm mwyaf cyffredin dros sesiynau a gollwyd yn ystod yr wythnos rhwng 13 Rhagfyr i 17 Rhagfyr 2021 oedd salwch (cod “I”), gyda 6.2% o sesiynau wedi’u colli oherwydd y rheswm hwn.