Frequencies for b_1_c18_51 variable in snf_rollup2540_96_1995 dataset :

 b_1_c18_51 |      Freq.     Percent        Cum.
------------+-----------------------------------
       1898 |          1        0.08        0.08
      29320 |          1        0.08        0.16
     506470 |          1        0.08        0.24
    7274303 |          1        0.08        0.32
          . |      1,231       99.68      100.00
------------+-----------------------------------
      Total |      1,235      100.00

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