 
<prompt> Bishiyar adadin yawan mutane | Kaso |  <response> Tsarin shekaru-jinsi na adadin yawan mutane da aka nuna a bishiyar adadin yawan mutane Tushen bishiyar mai faɗi ya nuna cewa, Nijeriya na da adadin yawan mutane da ke bunƙasa, wani bugaggen misali na ƙasashen da ke da hauhauwar alƙaluman haihuwa. Kason yaran da ke ƙasa da shekaru 15 ya kusanci kashi 46, alhali kason manyan da ke da shekaru 65 ko fiye yana da kashi 4.  