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