Frequencies for s2_18 variable in hcris2552_96_1996 dataset :

      s2_18 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        729       12.03       12.03
          2 |      2,467       40.70       52.72
          3 |          7        0.12       52.84
          4 |      1,192       19.66       72.50
          5 |         67        1.11       73.61
          6 |         16        0.26       73.87
          7 |          2        0.03       73.90
          8 |        152        2.51       76.41
          9 |        560        9.24       85.65
         10 |        280        4.62       90.27
         11 |        398        6.57       96.83
         12 |        115        1.90       98.73
         13 |         44        0.73       99.46
          . |         33        0.54      100.00
------------+-----------------------------------
      Total |      6,062      100.00

by Jean Roth , jroth@nber.org , 6 Sep 2018