PEDUC							     	ISCED97	   LIS recode
 0 never attended any level of education			  0		1
 1 primary (complete or incomplete)				  1		1
 2 lower secondary						  2A		1
 3 upper secondary						  3A		2
 4 post-secondary non-tertiary					  4A		2
 5 tertiary, graduate level					  5A		3
 6 tertiary, postgraduate level					  6		3
 7 still in education								9
-1                                             					9