Those among the Corporals who wish can sit for exams to extend their service and receive the rank of Deputy Sergeant or Junior Sergeant. Most of the conscripts/NCOs are forced to retire at 52 years of age with the rank of Sergeant with no chance of advancement if they do not have a college degree. Less than 2% of conscripts advance into the commissioned officer ranks.
Corporals who want to stay in service longer can take exams to become Deputy Sergeant or Junior Sergeant. Most conscripts are forced to retire at 52 as sergeants without the chance of promotion unless they have a college degree. Only about 2% of conscripts make it into commissioned officer ranks.