Frequencies for d_4_irf_c13_91 variable in prds_hosp10_yr2015 dataset :

d_4_irf_c13 |
        _91 |      Freq.     Percent        Cum.
------------+-----------------------------------
          2 |          1        0.02        0.02
          4 |          1        0.02        0.03
          7 |          1        0.02        0.05
          . |      6,255       99.95      100.00
------------+-----------------------------------
      Total |      6,258      100.00

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