Frequencies for s3_1_c15_18 variable in hcris2552_10_2010 dataset :

    s300001 |
      01800 |
      01500 |
    s300001 |
01800 01500 |      Freq.     Percent        Cum.
------------+-----------------------------------
         19 |          2        0.09        0.09
         25 |          1        0.04        0.13
         60 |          1        0.04        0.17
         70 |          1        0.04        0.22
        685 |          1        0.04        0.26
          . |      2,316       99.74      100.00
------------+-----------------------------------
      Total |      2,322      100.00

by Jean Roth , jroth@nber.org , 23 Aug 2018