Frequencies for a_c2_4501 variable in hcris2552_10_2012 dataset :

        icf |
    a000000 |
04501 00200 |      Freq.     Percent        Cum.
------------+-----------------------------------
      99223 |          1        0.02        0.02
     426009 |          1        0.02        0.03
     650015 |          1        0.02        0.05
   1.85e+07 |          1        0.02        0.06
          . |      6,223       99.94      100.00
------------+-----------------------------------
      Total |      6,227      100.00

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