This is the main driver behind overall absence and accounted for 55.3% of all absence - down from 57.3% in 2015/16 and 60.1% in 2014/15.
While the overall absence rate has slightly increased since 2015/16 the illness rate has stayed the same at 2.6%.
The absence rate due to other unauthorised circumstances has also stayed the same since 2015/16 at 0.7%.
Absence due to family holiday
The unauthorised holiday absence rate has increased gradually since 2006/07 while authorised holiday absence rates are much lower than in 2006/07 and remained steady over recent years.
The percentage of pupils who missed at least 1 session due to family holiday increased to 16.9% - up from 14.7% in 2015/16.
The absence rate due to family holidays agreed by the school stayed at 0.1%.
Meanwhile, the percentage of all possible sessions missed due to unauthorised family holidays increased to 0.4% - up from 0.3% in 2015/16.
A regulation amendment in September 2013 stated that term-time leave could only be granted in exceptional circumstances which explains the sharp fall in authorised holiday absence between 2012/13 and 2013/14.
These statistics and data relate to the period after the Isle of Wight Council v Jon Platt High Court judgment (May 2016) where the High Court supported a local magistrates’ ruling that there was no case to answer.
They also partially relate to the period after the April 2017 Supreme Court judgment where it unanimously agreed that no children should be taken out of school without good reason and clarified that 'regularly' means 'in accordance with the rules prescribed by the school'.