▁island er , ▁ 0 . 8 % ▁from ▁other ▁races , ▁and ▁ 2 . 1 % ▁from ▁two ▁or ▁more ▁races . ▁Those ▁of ▁His pan ic ▁or ▁Lat ino ▁origin ▁made ▁up ▁ 3 . 1 % ▁of ▁the ▁population . ▁In ▁terms ▁of ▁ancest ry , ▁ 2 9 . 3 % ▁were ▁German , ▁ 1 7 . 8 % ▁were ▁Irish , ▁ 1 3 . 8 % ▁were ▁English , ▁ 6 . 7 % ▁were ▁American , ▁and ▁ 6 . 2 % ▁were ▁Norwegian . ▁ ▁Of ▁the ▁ 3 , 6 6 0 ▁households , ▁ 2 2 . 8 % ▁had ▁children ▁under ▁the ▁age ▁of ▁ 1 8 ▁living ▁with ▁them , ▁ 5 4 . 7 % ▁were ▁married ▁cou ples ▁living ▁together , ▁ 6 . 4 % ▁had ▁a ▁female ▁house holder ▁with ▁no ▁husband ▁present , ▁ 3 4 . 5 % ▁were ▁non - famil ies , ▁and ▁ 2 9 . 3 % ▁of ▁all ▁households ▁were ▁made ▁up ▁of ▁individuals . ▁The ▁average ▁household ▁size ▁was ▁ 2 . 2 3 ▁and ▁the ▁average ▁family ▁size ▁was ▁ 2 . 7 1 . ▁The ▁median ▁age ▁was ▁ 4 9 . 0 ▁years . ▁ ▁The ▁median ▁income ▁for ▁a ▁household ▁in ▁the ▁county ▁was ▁$ 4 1 , 8 3 5 ▁and ▁the ▁median ▁income ▁for ▁a ▁family ▁was ▁$ 4 6 , 4 1 5 . ▁M ales ▁had ▁a ▁median ▁income