Frequencies for a_c1_28 variable in snf_rollup2540_96_1997 dataset :

    a_c1_28 |      Freq.     Percent        Cum.
------------+-----------------------------------
        242 |          1        0.01        0.01
        732 |          1        0.01        0.02
       1927 |          1        0.01        0.03
       2948 |          1        0.01        0.03
       5104 |          1        0.01        0.04
       6390 |          1        0.01        0.05
       6459 |          1        0.01        0.06
      12181 |          1        0.01        0.07
      15951 |          1        0.01        0.08
      27570 |          2        0.02        0.09
      29112 |          1        0.01        0.10
      29475 |          1        0.01        0.11
      37059 |          1        0.01        0.12
      38412 |          1        0.01        0.13
      65180 |          1        0.01        0.13
    1555433 |          1        0.01        0.14
          . |     11,901       99.86      100.00
------------+-----------------------------------
      Total |     11,918      100.00

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