Frequencies for s3_1_c17_3 variable in snf_rollup2540_96_1996 dataset :

 s3_1_c17_3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          6        0.06        0.06
          2 |          4        0.04        0.10
          3 |          1        0.01        0.11
          4 |          1        0.01        0.12
          6 |          3        0.03        0.16
          7 |          2        0.02        0.18
          8 |          1        0.01        0.19
          9 |          1        0.01        0.20
         10 |          4        0.04        0.24
         13 |          2        0.02        0.26
         14 |          2        0.02        0.28
         15 |          1        0.01        0.29
         17 |          1        0.01        0.30
         18 |          1        0.01        0.31
         21 |          2        0.02        0.33
         24 |          1        0.01        0.34
         26 |          1        0.01        0.35
         35 |          1        0.01        0.36
        299 |          1        0.01        0.37
          . |      9,572       99.63      100.00
------------+-----------------------------------
      Total |      9,608      100.00

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