6 ▁est .) ▁ ▁Urban ization ▁urban ▁population : ▁ 1 8 . 6 % ▁of ▁total ▁population ▁( 2 0 1 5 ) ▁rate ▁of ▁urban ization : ▁ 3 . 1 8 % ▁annual ▁rate ▁of ▁change ▁( 2 0 1 0 - 1 5 ▁est .) ▁ ▁Sex ▁ratio ▁at ▁birth : ▁ 1 . 0 4 ▁male ( s )/ f em ale ▁ 0 - 1 4 ▁years : ▁ 1 . 0 7 ▁male ( s )/ f em ale ▁ 1 5 - 2 4 ▁years : ▁ 1 ▁male ( s )/ f em ale ▁ 2 5 - 5 4 ▁years : ▁ 0 . 8 2 ▁male ( s )/ f em ale ▁ 5 5 - 6 4 ▁years : ▁ 0 . 9 5 ▁male ( s )/ f em ale ▁ 6 5 ▁years ▁and ▁over : ▁ 0 . 8 6 ▁male ( s )/ f em ale ▁total ▁population : ▁ 0 . 9 9 ▁male ( s )/ f em ale ▁( 2 0 1 6 ▁est .) ▁ ▁L anguages ▁▁ ▁Nep al ' s ▁diverse ▁lingu istic ▁her itage ▁evol ved ▁from ▁three ▁major ▁language ▁groups : ▁Ind o - A ry an , ▁Tib eto - B ur man ▁languages , ▁and ▁various ▁ind igen ous ▁language ▁isol ates . ▁According ▁to ▁the ▁ 2 0 0 1 ▁national ▁census , ▁ 9 2 ▁different ▁living ▁languages ▁are ▁spoken ▁in ▁Nep al ▁( a