Frequencies for a_c1_4501 variable in hcris2552_10_2011 dataset :

        icf |
    a000000 |
04501 00100 |      Freq.     Percent        Cum.
------------+-----------------------------------
    1829846 |          1        0.02        0.02
    2391699 |          1        0.02        0.03
   1.70e+07 |          1        0.02        0.05
   2.22e+07 |          1        0.02        0.07
          . |      6,146       99.93      100.00
------------+-----------------------------------
      Total |      6,150      100.00

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