prgtype  gender  id ses schtyp  level
  general    0  70    4   1      1  
   vocati    1 121    4          1  
  general    0  86               1  
   vocati    0 141    4   3      1  
 academic    0 172    4   2      1  
 academic    0 113    4   2      1  
  general    0  50    3   2      1  
 academic    0  11    1   2      1