PEDUC								     	ISCED97	   LIS recode	 
 110 no education, not even one year of primary school			0		1
 120 primary education							1		1
 130 lower secondary education						2		1
 210 upper secondary education						3C		2
 220 upper secondary education						3A,3B		2
 310 first stage of tertiary education					5B		3
 320 first stage of tertiary education					5A		3
 390 first and second stage of tertiary education			5A,5B,6		3
  -1 not in Universe 									9