Frequencies for sec505eliga variable in impact2007 dataset :

Section 505 |
   eligible |
    'YES' = |
eligible to |
  receive a |
 wage index |
 adjustment |
    1st 1/2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      3,443       93.64       93.64
        YES |        234        6.36      100.00
------------+-----------------------------------
      Total |      3,677      100.00

by Jean Roth , jroth@nber.org , 17 Mar 2016