Global Reporting Initiative+Injury rate, GRI 403-9-a (formerly G4-LA6-a)+Telkom+2017+Discussion

Although not 100% matching with the information that the metric specifically asks for. On page 85, the report does so evidence of using an alternative metric of displaying an injury rate.

In addition, it refers to a 'lost time injury frequency rate' of 1.37 which implies that this metric is based on the frequency rate of injuries that caused lost time.