PEDUC							     ISCED97	   LIS recode
  1  less than 1st grade							1 
  2  1st , 2nd, 3rd or 4th grade						1
  3  5th or 6th grade								1
  4  7th or 8th grade								1
  5  9th grade									1
  6  10th grade									1
  7  11th grade									1
  8  12th grade, no diploma							1
  9  high school graduate (high school diploma or equivalent)			2
 10  some college, no degree							2
 11  associate degree, vocational program					3
 12  associate degree, academic program						3
 13  bachelor's degree								3
 14  master's degree								3
 15  professional school degree (MD, DDS, DVM, LLB, JD)				3
 16  doctorate degree								3