County (German name in brackets)[26] ethnic German population (1910) ethnic German population (1926) ethnic German population (1934) decline (absolute numbers) decline (percent) Odolanów (Adelnau) 17,148 10,038 9,442 −7,706 −44.9 Międzychód (Birnbaum) 16,012 4,655 4,377 −11,635 −72.7 Bydgoszcz (Bromberg, town) 74,292 11,016 10,021 −64,271 −86.5 Bydgoszcz (Bromberg, district) 31,212 13,281 12,211 −19,001 −60.9 Czarnków (Czarnikau) 17,273 5,511 4,773 −6,500 −57.7 Gniezno (Gnesen) 26,275 8,616 7,876 −18,399 −70.0 Gostyń (Gostyn) 6,528 2,395 2,162 −4,366 −66.9 Grodzisk Wielkopolski (Grätz) / Nowy Tomyśl (Neutomischel) 33,244 16,576 16,555 −16,689 −50.2 Inowrocław (Hohensalza) 28,394 8,455 8,096 −20,298 −71.5 Jarocin (Jarotschin) / Pleszew (Pleschen) 15,436 4,667 4,019 −11,417 −74.0 Kępno (Kempen) / Ostrzeszów (Schildberg) 16,631 9,310 10,889 −5,742 −34.5 Chodzież (Kolmar) 34,004 14,246 12,348 −21,656 −63.7 Koźmin (Koschmin) / Krotoszyn (Krotoschin) 21,542 6,542 5,807 −15,735 −73.0 Leszno (Lissa) 31,033 9,917 8,371 −22,662 −73.0 Mogilno (Mogilno) / Strzelno (Strelno) 21,711 8,727 7,770 −13,941 −64.2 Oborniki (Obornik) 22,450 9,417 8,410 −14,040 −62.5 Poznań (Posen, town) 65,321 5,980 4,387 −60,934 −93.3 Poznań (Posen, district) 21,486 4,687 4,252 −17,234 −80.2 Rawicz (Rawitsch) 21,842 6,184 5,038 −16,804 −76.9 Szamotuły (Samter) 17,071 5,029 4,841 −12,230 −71.6 Śmigiel (Schmiegel) / Kościan (Kosten) 11,775 3,636 3,488 −8,287 −70.4 Śrem (Schrimm) 10,017 2,802 3,574 −6,443 −64.3 Środa Wielkopolska (Schroda) 6,201 2,269 2,029 −4,172 −67.3 Szubin (Schubin) 21,035 10,193 8,879 −12,156 −57.8 Wyrzysk (Wirsitz) 34,235 13,495 12,410 −21,825 −63.8 Wolsztyn (Wollstein) 22,236 10,369 9,313 −12,923 −58.1 Wągrowiec (Wongrowitz) 16,309 8,401 7,143 −9,166 −56.2 Września (Wreschen) 7,720 2,436 2,115 −6,505 −72.6 Żnin (Znin) 10,906 5,404 4,539 −6,367 −58.4 Poznań Voivodship (total) 679,339 224,254 203,135 −468,204 −68.9