PEDUC							     	ISCED97	   LIS recode
 0 never been in education                                   	  0		1
 1 primary                       				  1		1
 2 lower secondary                       			  2A		1
 3 upper secondary						  3A		2
 4 post-secondary non-tertiary					  4A		2
 5 first or second stage of tertiary				  5A/6		3
 7 still in education								9
-1										9