Frequencies for s3_1_c3_2001 variable in hcris2552_10_2015 dataset :

        icf |
    s300001 |
02001 00300 |      Freq.     Percent        Cum.
------------+-----------------------------------
       3294 |          1        0.02        0.02
      25915 |          1        0.02        0.03
          . |      6,256       99.97      100.00
------------+-----------------------------------
      Total |      6,258      100.00

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