PEDUC							     ISCED97	   LIS recode
  1  no education								1
  2  pre-primary								1
  3  1° primary									1
  4  2° primary 								1
  5  3° primary									1
  6  4° primary									1
  7  5° primary									1
  8  6° primary									1
  9  1° secondary								1
 10  2° secondray								1
 11  3° secondary								1
 12  preparatory, vocational or normal incomplete				1
 13  preparatory, vocational or normal complete					2
 14  superior incomplete							2
 15  superior complete								3
 16  postgraduate								3
 17  secondary incomplete							1