Frequencies for spec_ind variable in hcris2552_10_2011 dataset :

    special |
  indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,088       98.99       98.99
          F |         62        1.01      100.00
------------+-----------------------------------
      Total |      6,150      100.00

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