Cyborgs assimilate natives, and turn them into colonists. One assimilated native clan yields one new cyborg colonist clan.

Native_clans_assimilated =
   Trunc(Colonist_clans * BorgAssimilationRate / 100)
   ...at most Native_clans

► Note: PHost versions before 4.1 / 3.5 would have removed Ceil(...) native clans, but only added Trunc(...) clans.