▁black ▁() ▁houses ▁( ). ▁ ▁Dem ograph ics ▁ ▁Schwar zh ä us ern ▁has ▁a ▁population ▁() ▁of ▁. ▁ ▁, ▁ 2 . 9 % ▁of ▁the ▁population ▁are ▁resident ▁foreign ▁national s . ▁ ▁Over ▁the ▁last ▁ 1 0 ▁years ▁( 2 0 0 0 - 2 0 1 0 ) ▁the ▁population ▁has ▁changed ▁at ▁a ▁rate ▁of ▁ 9 . 8 %. ▁ ▁M igration ▁account ed ▁for ▁ 5 . 7 %, ▁while ▁birth s ▁and ▁death s ▁account ed ▁for ▁ 0 . 5 %. ▁ ▁Most ▁of ▁the ▁population ▁() ▁speak s ▁German ▁( 4 2 7 ▁or ▁ 9 7 . 5 %) ▁as ▁their ▁first ▁language , ▁French ▁is ▁the ▁second ▁most ▁common ▁( 4 ▁or ▁ 0 . 9 %) ▁and ▁Ser bo - C ro at ian ▁is ▁the ▁third ▁( 4 ▁or ▁ 0 . 9 %). ▁ ▁There ▁is ▁ 1 ▁person ▁who ▁speak s ▁Italian . ▁ ▁, ▁the ▁population ▁was ▁ 5 0 . 4 % ▁male ▁and ▁ 4 9 . 6 % ▁female . ▁ ▁The ▁population ▁was ▁made ▁up ▁of ▁ 2 3 1 ▁Swiss ▁men ▁( 4 8 . 1 % ▁of ▁the ▁population ) ▁and ▁ 1 1 ▁( 2 . 3 %) ▁non - Sw iss ▁men . ▁ ▁There ▁were ▁ 2 3 5 ▁Swiss ▁women ▁( 4 9 . 0 %) ▁and ▁ 3 ▁( 0 . 6 %) ▁non - Sw iss ▁women . ▁ ▁Of