Frequencies for b_1_c18_40 variable in snf_rollup2540_96_2011 dataset :

 b_1_c18_40 |      Freq.     Percent        Cum.
------------+-----------------------------------
        222 |          1        0.06        0.06
       3480 |          1        0.06        0.11
      15947 |          1        0.06        0.17
      17508 |          1        0.06        0.22
      20990 |          1        0.06        0.28
      28261 |          1        0.06        0.33
      36028 |          1        0.06        0.39
      95237 |          1        0.06        0.44
      97973 |          1        0.06        0.50
     115806 |          1        0.06        0.55
     118081 |          1        0.06        0.61
     135652 |          1        0.06        0.66
     143713 |          1        0.06        0.72
     368395 |          1        0.06        0.77
          . |      1,795       99.23      100.00
------------+-----------------------------------
      Total |      1,809      100.00

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