How to show a map loading progress while use LoadStreamLevel?

Hey, guys. I try to do a animated loading screen during using LoadStreamLevel.But I can’t find a way to show a loading progress bar.Does anyone know how to do that.I know i can show some animation during Stream a Level, but i really need a loading progress bar to accrate tell the player what is the loading status now.Some of my game’s level is pretty huge, and it takes minutes to be Loaded, So a loading screen with loading progress bar is more user friendly.