Frequencies for sec505elig variable in impact2013 dataset :

Section 505 |
   eligible |
    'YES' = |
eligible to |
  receive a |
 wage index |
 adjustment |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      3,214       91.83       91.83
        YES |        286        8.17      100.00
------------+-----------------------------------
      Total |      3,500      100.00

by Jean Roth , jroth@nber.org , 16 Dec 2016