In 2017, over 37% of the permanent resident population of Switzerland aged 15 or over had a migration background. While 30% belonged to the 1st generation, over 7% were part of the 2nd generation. This population represents the population for which integration into Swiss society is to be measured.
To measure integration, the reference typology of the population by migration status is adapted slightly: The population with a migration background includes all persons with foreign nationality (including 3rd generation foreigners). This population also includes 1st generation naturalised Swiss citizens, 2nd generation naturalised Swiss citizens with at least one parent born abroad and Swiss nationals from birth both of whose parents were born abroad.