Frequencies for s2_18 variable in hcris2552_96_1999 dataset :

      s2_18 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        773       12.45       12.45
          2 |      2,557       41.18       53.62
          3 |          7        0.11       53.74
          4 |      1,233       19.86       73.59
          5 |         62        1.00       74.59
          6 |         56        0.90       75.49
          7 |          3        0.05       75.54
          8 |        140        2.25       77.79
          9 |        532        8.57       86.36
         10 |        282        4.54       90.90
         11 |        372        5.99       96.89
         12 |        106        1.71       98.60
         13 |         39        0.63       99.23
          . |         48        0.77      100.00
------------+-----------------------------------
      Total |      6,210      100.00

by Jean Roth , jroth@nber.org , 7 Sep 2018