Administrative Detention of Foreign Nationals in Figures

For carrying out the removal of a foreign national, cantons may enforce administrative detention where this respects the principle of proportionality, and no other less coercive measure is available. The detention of asylum seekers whose application has been denied or under the Dublin procedure, and of persons residing irregularly in Switzerland, should therefore be applied as a last resort, and for the shortest possible time. But what is the situation in practice?