Frequencies for e_b_ipf_c1_12 variable in hcris2552_10_2012 dataset :

    e00b18b |
01200 00100 |      Freq.     Percent        Cum.
------------+-----------------------------------
        109 |          1        0.02        0.02
        217 |          1        0.02        0.03
       3301 |          1        0.02        0.05
       6680 |          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