Frequencies for d_1_c3_31 variable in snf_rollup2540_96_1997 dataset :

  d_1_c3_31 |      Freq.     Percent        Cum.
------------+-----------------------------------
        542 |          1        0.01        0.01
        774 |          1        0.01        0.02
       9670 |          1        0.01        0.03
      33659 |          1        0.01        0.03
      86014 |          1        0.01        0.04
          . |     11,913       99.96      100.00
------------+-----------------------------------
      Total |     11,918      100.00

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