Frequencies for s3_1_c5_16 variable in hcris2552_10_2010 dataset :

        ipf |
    s300001 |
01600 00500 |      Freq.     Percent        Cum.
------------+-----------------------------------
         49 |          1        0.04        0.04
         58 |          1        0.04        0.09
        454 |          1        0.04        0.13
        901 |          1        0.04        0.17
       3483 |          1        0.04        0.22
          . |      2,317       99.78      100.00
------------+-----------------------------------
      Total |      2,322      100.00

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