6 4 ▁years : ▁ 1 . 0 1 ▁male ( s )/ f em ale ▁ 6 5 ▁years ▁and ▁over : ▁ 0 . 9 6 ▁male ( s )/ f em ale ▁total ▁population : 1 ▁male ( s )/ f em ale ▁( 2 0 1 8 ▁est .) ▁ ▁Life ▁expect ancy ▁at ▁birth ▁total ▁population : ▁ 6 3 . 8 ▁years ▁( 2 0 1 8 ▁est .) ▁male : ▁ 6 1 . 6 ▁years ▁( 2 0 1 8 ▁est .) ▁female : ▁ 6 6 ▁years ▁( 2 0 1 8 ▁est .) ▁ ▁total ▁population : ▁ 5 7 ▁years ▁( 2 0 1 1 ▁est .) ▁male : ▁ 5 5 . 4 4 ▁years ▁female : ▁ 5 8 . 6 ▁years ▁ ▁Eth nic ▁groups ▁ ▁There ▁are ▁officially ▁ 1 7 ▁eth nic ▁groups ▁that ▁make ▁up ▁Liber ia ' s ▁ind igen ous ▁African ▁population , ▁making ▁up ▁maybe ▁ 9 5 % ▁of ▁the ▁total : ▁K p elle , ▁the ▁largest ▁group ; ▁Bass a , ▁G io , ▁Kru , ▁Gre bo , ▁Mand ingo , ▁M ano , ▁Kra hn , ▁G ola , ▁G band i , ▁L oma , ▁K iss i , ▁V ai , ▁S ap o , ▁Belle h ▁( K u wa a ), ▁M ende ▁and ▁De y . ▁ ▁There ▁are ▁also ▁more ▁or ▁less ▁nom adic ▁groups ▁like ▁the ▁F ula , ▁who ▁eng