Frequencies for sec505elig variable in impact2017 dataset :

Section 505 |
   eligible |
    'YES' = |
eligible to |
  receive a |
 wage index |
 adjustment |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      3,117       91.43       91.43
        YES |        292        8.57      100.00
------------+-----------------------------------
      Total |      3,409      100.00

by Jean Roth , jroth@nber.org , 30 Aug 2017