PEDUC							     ISCED97	   LIS recode
  0  no diplome									1
  1  primary school								1
  2  first stage of vocational education					2
  3  first stage of secondary level education					1
  4  second stage of vocational education					2
  5  second stage of secondary level education					2
  6  first stage of third level education					3
  7  university degree or hihger						3
  8  still at school/studying							9