Labour Force Survey (LFS)
Some of the typical groups will be unemployed who are not able to receive unemployment benefits or social assistance (i.e. because of their spouse’s income or because of a missing membership of an unemployment insurance or unemployed who are not ready to start a job (match group 2 and 3), but have still not surpassed to early retirement etc. and hereby left the workforce)).
https://www.dst.dk/en/Statistik/dokumentation/metode/aku-arbejdskraftundersoegelsen