Frequencies for s3_1_c9_21 variable in hcris2552_10_2016 dataset :

       oltc |
    s300001 |
02100 00900 |      Freq.     Percent        Cum.
------------+-----------------------------------
        .86 |          1        0.02        0.02
       2.21 |          1        0.02        0.03
          . |      6,180       99.97      100.00
------------+-----------------------------------
      Total |      6,182      100.00

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