whichever event occurs last, and which shall be equal to 50 percent of the retirement benefits which the deceased member was drawing at the time of death or, in the case of a member who dies prior to his sixtieth birthday, which such deceased member would have been entitled to receive upon reaching 60 years of age had he lived and ceased service as a judge of the probate court or employee of the board on the date of his death.
OCGA § 47-11-71.1