Frequencies for e_b_irf_c1_4 variable in hcris2552_10_2015 dataset :

    e00c18b |
00400 00100 |      Freq.     Percent        Cum.
------------+-----------------------------------
       1829 |          1        0.02        0.02
       5028 |          1        0.02        0.03
       9247 |          1        0.02        0.05
     531879 |          1        0.02        0.06
          . |      6,254       99.94      100.00
------------+-----------------------------------
      Total |      6,258      100.00

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