'Yan Najeriya sun fi 'yan Afirka ta Kudu tsawon rayuwa kamar yadda wasu sabbin alkalluman da aka fitar a shekarar 2016 suka nuna. Alkalluman sun nuna cewa tsawon rayuwar 'yan Najeriya masu shekara 18 ya dara na takwarorinsu na Afirka ta Kudu da shekara 8.