6. Personnel expenses and human resources

T 039
     
in € thousand 2015/16 2014/15
     
Wages and salaries 349,592 334,184
Social security, pension and other benefit expenses 98,992 97,111
     
  448,584 431,295

The pension expenses primarily comprise allocations to the provisions for pensions.

The average number of employees in the Group during the year was as follows:

T 040
     
  2015/16 2014/15
     
Blue collar 4,017 4,013
White collar 2,083 2,052
Trainees and apprentices 255 252
     
  6,355 6,317