Frequencies for s2_18 variable in hcris2552_96_1997 dataset :

      s2_18 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        762       11.94       11.94
          2 |      2,559       40.11       52.05
          3 |         10        0.16       52.21
          4 |      1,381       21.65       73.86
          5 |         67        1.05       74.91
          6 |         15        0.24       75.14
          7 |          3        0.05       75.19
          8 |        147        2.30       77.49
          9 |        569        8.92       86.41
         10 |        280        4.39       90.80
         11 |        390        6.11       96.91
         12 |        104        1.63       98.54
         13 |         43        0.67       99.22
          . |         50        0.78      100.00
------------+-----------------------------------
      Total |      6,380      100.00

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