Frequencies for b_1_c0_4501 variable in hcris2552_10_2010 dataset :

        icf |
    b000001 |
04501 00000 |      Freq.     Percent        Cum.
------------+-----------------------------------
    2731961 |          1        0.04        0.04
   2.57e+07 |          1        0.04        0.09
   3.08e+07 |          1        0.04        0.13
          . |      2,319       99.87      100.00
------------+-----------------------------------
      Total |      2,322      100.00

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