The most common reason for sessions missed during the week of 15 November to 19 November 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 15 Tachwedd i 19 Tachwedd 2021 oedd salwch (cod “I”), gyda 6.2% o sesiynau wedi’u colli oherwydd y rheswm hwn.