Frequencies for e_b_ipf_c1_15 variable in hcris2552_10_2012 dataset :

    e00b18b |
01500 00100 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.02        0.02
        251 |          1        0.02        0.03
      13716 |          1        0.02        0.05
          . |      6,224       99.95      100.00
------------+-----------------------------------
      Total |      6,227      100.00

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