Frequencies for d_4_irf_c13_91 variable in prds_hosp10_yr2011 dataset :

d_4_irf_c13 |
        _91 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.03        0.03
          2 |          5        0.08        0.11
          6 |          1        0.02        0.13
         23 |          1        0.02        0.15
          . |      6,141       99.85      100.00
------------+-----------------------------------
      Total |      6,150      100.00

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