Frequencies for d_4_irf_c11_52 variable in prds_hosp10_yr2016 dataset :

d_4_irf_c11 |
        _52 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.03        0.03
          3 |          1        0.02        0.05
          4 |          1        0.02        0.06
          7 |          1        0.02        0.08
         18 |          1        0.02        0.10
          . |      6,176       99.90      100.00
------------+-----------------------------------
      Total |      6,182      100.00

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