SKOLM02B is an inventory of the number of unique students at the Danish music schools. The category 'unknown' is an invenory of students courses that have either had invalid personal data or have been removed because of discretion. The table SKOLM02A is an inventory of students courses at the Danish music schools. The unique number of students related to the Basic Music Course (MGK) can be found in table SKOLM03. Due to a lack of reporting "companion students" in the schools' student administration system for a municipality in the 2021/22 season, the number of unique students is approximately 500 students too low.