▁the ▁population ▁( between ▁age ▁ 2 5 - 6 4 ) ▁have ▁completed ▁either ▁non - m and atory ▁upper ▁secondary ▁education ▁or ▁additional ▁higher ▁education ▁( e ither ▁university ▁or ▁a ▁Fach ho ch schule ). ▁ ▁Z ill is - Re ischen ▁has ▁an ▁un emp loyment ▁rate ▁of ▁ 1 . 2 4 %. ▁ ▁, ▁there ▁were ▁ 3 8 ▁people ▁employed ▁in ▁the ▁primary ▁economic ▁sector ▁and ▁about ▁ 1 2 ▁business es ▁involved ▁in ▁this ▁sector . ▁▁ 1 0 6 ▁people ▁are ▁employed ▁in ▁the ▁secondary ▁sector ▁and ▁there ▁are ▁ 8 ▁business es ▁in ▁this ▁sector . ▁▁ 5 2 ▁people ▁are ▁employed ▁in ▁the ▁t ert i ary ▁sector , ▁with ▁ 2 2 ▁business es ▁in ▁this ▁sector . ▁ ▁The ▁historical ▁population ▁is ▁given ▁in ▁the ▁following ▁table : ▁ ▁L anguages ▁Most ▁of ▁the ▁population ▁() ▁speak s ▁German ▁( 7 9 . 7 % ), ▁with ▁Rom ans h ▁being ▁second ▁most ▁common ▁( 1 2 . 7 %) ▁and ▁Italian ▁being ▁third ▁( ▁ 2 . 1 %). ▁ ▁Heritage ▁sites ▁of ▁national ▁significance ▁The ▁S . ▁Mar te gn / St ▁Martin ' s ▁Church , ▁the ▁C ave ▁under ▁Has en stein ▁( a ▁Roman ▁cult ▁site ) ▁and ▁the ▁Wild ener - ▁and ▁Prem oli - B rid ges ▁are ▁listed ▁as ▁Swiss ▁her itage ▁sites ▁of ▁national ▁significance . ▁ ▁The ▁first ▁church ▁in ▁Z ill is ▁dates ▁from ▁about ▁the ▁ 5 th