Frequencies for b_1_c18_31 variable in snf_rollup2540_96_1995 dataset :

 b_1_c18_31 |      Freq.     Percent        Cum.
------------+-----------------------------------
      -2635 |          1        0.08        0.08
        235 |          1        0.08        0.16
       1098 |          1        0.08        0.24
       1965 |          1        0.08        0.32
       2127 |          1        0.08        0.40
       2319 |          1        0.08        0.49
       2365 |          1        0.08        0.57
       2977 |          1        0.08        0.65
       3226 |          1        0.08        0.73
       6450 |          1        0.08        0.81
       7165 |          1        0.08        0.89
      10305 |          1        0.08        0.97
      12910 |          1        0.08        1.05
      13478 |          1        0.08        1.13
      18247 |          1        0.08        1.21
      18405 |          1        0.08        1.30
      18734 |          1        0.08        1.38
      44783 |          1        0.08        1.46
      86669 |          1        0.08        1.54
     115978 |          1        0.08        1.62
     354755 |          1        0.08        1.70
          . |      1,214       98.30      100.00
------------+-----------------------------------
      Total |      1,235      100.00

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