Mahimman bayanai Tsakanin 2015 zuwa 2050, adadin mutanen duniya sama da shekaru 60 zai kusan ninka daga 12% zuwa 22%. Zuwa shekarar 2020, adadin mutanen da suka kai shekara 60 zuwa sama zai zarce na yara kasa da shekaru 5. A cikin 2050, kashi 80% na tsofaffi za su kasance a cikin ƙasashe masu ƙanƙanta da matsakaicin kuɗi. Takin tsufa na yawan jama'a yana da yawa ...
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