Got a question on this officer's CEP. Seems high but need confirmation

Years in service: 6 years
Age: 32
Male

2012- C grade mx 12 (First ranking)
2013 - B grade mx 12
2014- B grade mx 12
2015 B grade mx 11 (Promotion)
2016 B grade mx 11
2017 - B grade mx 11A (Promotion)

How is the trajectory? What is the current cep 10 or possibly 9?