Frequencies for b_1_c0_51 variable in snf_rollup2540_96_2011 dataset :

  b_1_c0_51 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.06        0.06
        780 |          1        0.06        0.11
       1039 |          1        0.06        0.17
     174009 |          1        0.06        0.22
          . |      1,805       99.78      100.00
------------+-----------------------------------
      Total |      1,809      100.00

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