▁migration ▁rate ▁is ▁estimated ▁to ▁be ▁ 6 1 ▁migr ants ▁per ▁ 1 0 0 , 0 0 0 ▁people . ▁According ▁to ▁the ▁ 2 0 1 1 ▁census , ▁ 6 5 . 9 % ▁of ▁the ▁total ▁population ▁is ▁liter ate . ▁ ▁Population ▁G row th ▁▁ ▁The ▁population ▁of ▁Nep al ▁has ▁been ▁stead ily ▁rising ▁in ▁recent ▁dec ades . ▁In ▁the ▁June ▁ 2 0 0 1 ▁census , ▁there ▁was ▁a ▁population ▁of ▁about ▁ 2 3 ▁million ▁in ▁Nep al . ▁The ▁population ▁increased ▁by ▁ 5 ▁million ▁from ▁the ▁preceding ▁ 1 9 9 1 ▁census ; ▁the ▁growth ▁rate ▁is ▁ 2 . 3 %. ▁The ▁current ▁population ▁is ▁roughly ▁ 3 0 ▁million ▁which ▁cont ributes ▁to ▁an ▁increase ▁of ▁about ▁ 3 ▁million ▁people ▁every ▁ 5 ▁years . ▁ ▁Si xty ▁cas te ▁and ▁lingu istic ▁sub groups ▁have ▁formed ▁throughout ▁time ▁with ▁the ▁waves ▁of ▁migration ▁from ▁Tib et ▁and ▁India . ▁There ▁was ▁a ▁moder ate ▁amount ▁of ▁imm igration ▁early ▁in ▁Nep al ' s ▁history , ▁then ▁the ▁population ▁essentially ▁remained ▁the ▁same ▁without ▁any ▁significant ▁fl uct u ations ▁for ▁over ▁one ▁hundred ▁years . ▁Natural ▁dis aster s ▁and ▁the ▁following ▁government ▁res ett lement ▁programs ▁in ▁the ▁ 1 9 5 0 s ▁led ▁to ▁a ▁sp ike ▁in ▁internal ▁migration ▁from ▁the ▁hills ▁to ▁the ▁T era i ▁region . ▁In ▁the ▁ 1 9 8 0 s ▁the ▁Western