Frequencies for d_4_irf_c11_55 variable in prds_hosp10_yr2011 dataset :

d_4_irf_c11 |
        _55 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.03        0.03
          2 |          3        0.05        0.08
          4 |          1        0.02        0.10
          5 |          1        0.02        0.11
          8 |          1        0.02        0.13
          9 |          1        0.02        0.15
         10 |          2        0.03        0.18
         16 |          1        0.02        0.20
         17 |          1        0.02        0.21
         18 |          1        0.02        0.23
         19 |          1        0.02        0.24
         22 |          1        0.02        0.26
         32 |          1        0.02        0.28
         33 |          1        0.02        0.29
         39 |          1        0.02        0.31
         41 |          1        0.02        0.33
         46 |          1        0.02        0.34
        107 |          1        0.02        0.36
        293 |          1        0.02        0.37
        539 |          1        0.02        0.39
        685 |          1        0.02        0.41
       1288 |          1        0.02        0.42
          . |      6,124       99.58      100.00
------------+-----------------------------------
      Total |      6,150      100.00

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