Nerra-d s tamawat belli 70% n yiselmaden semrasen isefranen i d-yellan deg tfelwit n uktazal i useɣti n yifuras n yinelmaden (anemsasa, taẓḍawt, tawatit, aseblel, asemres iwatan i yiferdisen n tuylayt) . 30% ttmuqulen s waṭas tucḍiwin i d-yettuɛawaden sɣur yinelmaden.