Frequencies for spec_ind variable in hcris2552_10_2015 dataset :

    special |
  indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,538       88.49       88.49
          F |        720       11.51      100.00
------------+-----------------------------------
      Total |      6,258      100.00

by Jean Roth , jroth@nber.org , 23 Aug 2018