Frequencies for spec_ind variable in snf_rpt2540_96_1996 dataset :

    special |
  indicator |      Freq.     Percent        Cum.
------------+-----------------------------------
            |        583        5.83        5.83
          0 |        792        7.91       13.74
          1 |      8,625       86.19       99.93
          P |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,007      100.00

by Jean Roth , jroth@nber.org , 17 Feb 2018