Data shall be collected annually or at shorter intervals on the structure of the population and social developments in Switzerland.
Data shall be collected on:
- the status, structure and development of the population;
- families, households and living conditions;
- work and earnings;
- health and social issues;
- 3 continuing education and training;
- migration;
- languages, religions and culture;
- transport and environment;
- buildings, apartments and workplaces and school establishments.
As far as possible, the survey is based on official registers.
For attributes not contained in the registers, random sample surveys shall be carried out.