Frequencies for s3_1_c2_2001 variable in hcris2552_10_2017 dataset :

        icf |
    s300001 |
02001 00200 |      Freq.     Percent        Cum.
------------+-----------------------------------
          9 |          1        0.03        0.03
         71 |          1        0.03        0.05
          . |      3,747       99.95      100.00
------------+-----------------------------------
      Total |      3,749      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2018