acc ording ▁to ▁the ▁ 1 9 3 1 ▁census ). ▁It ▁consisted ▁of ▁ 2 8 ▁pow i ats ▁( count ies ), ▁ 6 4 ▁cities , ▁and ▁ 2 3 4 ▁villages . ▁Rail road ▁density ▁was ▁high , ▁with ▁ 1 1 . 4   km . ▁per ▁ 1 0 0   km ² ▁( total ▁length ▁of ▁rail ro ads ▁within ▁the ▁Vo iv odes hip ' s ▁area ▁was ▁ 1 ▁ 8 8 7   km ., ▁second ▁in ▁the ▁whole ▁country ). ▁For ests ▁covered ▁ 2 6 . 7 % ▁of ▁the ▁vo iv odes hip , ▁which ▁was ▁higher ▁than ▁the ▁national ▁average ▁( in ▁ 1 9 3 7 , ▁the ▁average ▁was ▁ 2 2 . 2 %). ▁ ▁Pom or skie ▁Vo iv odes hip ▁was ▁one ▁of ▁the ▁rich est ▁and ▁best ▁developed ▁in ▁inter war ▁Poland . ▁With ▁numerous ▁cities ▁and ▁well - develop ed ▁rail , ▁it ▁also ▁provided ▁the ▁country ▁with ▁access ▁to ▁the ▁Balt ic ▁Sea . ▁Only ▁ 8 . 3 % ▁of ▁population ▁was ▁ill iter ate , ▁which ▁was ▁much ▁lower ▁than ▁the ▁national ▁average ▁of ▁ 2 3 . 1 % ▁( as ▁for ▁ 1 9 3 1 ). ▁Pol es ▁made ▁up ▁majority ▁of ▁population ▁( 8 8 %). ▁ ▁After ▁World ▁War ▁I , ▁the ▁number ▁of ▁Germ ans ▁was ▁ 1 1 7 , 2 5 1 ▁in ▁ 1 9 2 6 ▁and ▁ 1