Frequencies for d_4_irf_c11_72 variable in prds_hosp10_yr2014 dataset :

d_4_irf_c11 |
        _72 |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |          1        0.02        0.02
          4 |          1        0.02        0.03
          5 |          1        0.02        0.05
          6 |          1        0.02        0.06
         18 |          1        0.02        0.08
          . |      6,243       99.92      100.00
------------+-----------------------------------
      Total |      6,248      100.00

by Jean Roth , jroth@nber.org , 24 Aug 2018