1. immigrated after June 2006 to Switzerland,
2. foreign-born,
3. holding one of the following citizenships,
1. Germany
2. Austria
3. France
4. Italy
5. United Kingdom
6. Spain
7. Portugal
8. North America
9. India
10. West Africa
11. South America
4. holding a resident permit (B), settlement permit (C), short-term permit (L) or are diplomats/international civil servants,
5. aged 18 years or over at immigration,
6. aged between 24 and 64 years at the time of the survey
