PEDUC							     ISCED97	   LIS recode

  0  pre-primary								1
 10  primary							1		1
 21  lower secondary						2C		1
 22  lower secondary						2A		1
 31  upper secondary						3C		2
 33  upper secondary						3A		2
 41  post-secondary non-tertiary				4C		2
 43  post-secondary non-tertiary				4A		2
 51  first stage of tertiary					5B		3
 52  first stage of tertiary					5A		3
 60  second stage of tertitary education			6		3