Frequencies for d_4_irf_c13_91 variable in prds_hosp10_yr2010 dataset :

d_4_irf_c13 |
        _91 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.04        0.04
          2 |          2        0.09        0.13
          5 |          1        0.04        0.17
          . |      2,319       99.83      100.00
------------+-----------------------------------
      Total |      2,323      100.00

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