 
<prompt> Bishiyar adadin yawan mutane | Kaso |  <response> Babban tushen da ya bayyana samun matasa a adadin yawan jama'a. Raguwa a yawan mata 'yan tsakanin shekaru 10- 14 da 15-19 mataki ne ɗan kaɗan sannan zai iya zama saboda wani ɓangare na waɗanda aka yi hira da su ana ƙiyasin shekarun mata su kasance shekarun da aka ƙayyade na hira shekaru 15 domin ragen nauyin aikinsu. Haka kuma, an samu ƙari a yawan mata a tsakanin 'yan shekaru 45-49 da 50-54, wanda zai iya kasancewa saboda cire wasu mata daga cikin ajin shekarun da suka cancanta. Raguwa a adadin yawan jama'a a tsakanin 'yan shekaru 5-9 da 'yan ƙasa da shekaru 5 a tsakanin mata da maza ya nuna raguwar haihuwa, da aka yi bayani a babin da ke magana kan haihuwa.  