This compares to around 13 out of 20 contacts received by children who should have been offered contacts when they reached 3.5 years, the lowest completion rate of any contact.
Y ganran fwyaf o blant na chafodd eu gweld o fewn yr ystod oedran yw 3.5 mlwydd oed, lle cafodd bron i hanner y plant gysylltiad cyn y trothwy oedran isaf.