Ixef wis sin, yella-d ɣeftesleḍt tasnamkant nufa-d azal n 15nwawalen imaynuten (10%) i yettusmersen seg umawal-agi s unamek amaynut maca sɛan ak assaɣen asnamkanen d unamek-nsen amagnu yellan yakan deg tutlayt.