Here is the table in German:
Here is a translation:
Schweiss Verbindungstechnik = Welding connection technology : 60%
Koche/Kochinnen = Cooks : 54%
Lebensmittelherstelung = Food Production : 54%
Gerustbau = Scaffolding : 48%
Bus-, Strassenbahnfahrer/-innen = Bus and tram drivers : 47%
Berufe in der Fleischverarbeitung = Careers in meat processing : 46%
Gastronomieservice = Catering Service : 45%
Kunststoff-, Kautschukherstellung = Plastics and rubber manufacturing : 44%
Hotelservice = Hotel work : 40%
Berufskraftfahrer/-innen Guterverkehr = Professional Drivers : 39%
Spanende Metallbearbeitung = Metal Machining : 36%
Altenpflege = Elderly care : 32%
Speditions- und Logistikkaufleute = Freight forwarding and logistics clerks : 31%
Metallbau = Metal construction : 30%
Elektrotechnik = Electrical Engineering : 30%
Gesamtwirtschaft = Macroeconomics : 26%
Landwirtschaft = Agriculture : 15%
Justizverwaltung = Judicial Administration : 9%
Rettungsienst = Rescue service : 8%
It's not clear which nationalities the immigrant workers are from. If I was to guess, I'd say mainly Eastern European plus historic Turkish guest workers.
It's striking how dominant they are in the hospitality industry and construction.