Mission Control keeps track of some metrics for the current (or previous as it resets on new contract load) mission/contract. You can access the metrics with MissionControl.Instance.Metrics.

Additional Lances

NumberOfEmployerAdditionalLancesNumber of Employer AL lances that dropped
NumberOfTargetAdditionalLancesNumber of Target AL lances that dropped
NumberOfAdditionalLancesCombined count of NumberOfEmployerAdditionalLances and NumberOfTargetAdditionalLances