They say that Jeju police officer closed 298 missing person cases

They say that after taking over missing person duties last March,
they closed 298 missing person cases in about 1 year and 5 months.
Even including cases where the deceased were found, if they normally closed 298 cases reported to the police in just a year and a half,
they must be the world's best missing person investigator.
Just how much did they fake the results?