Frequencies for d_4_irf_c11_55 variable in prds_hosp10_yr2012 dataset :

d_4_irf_c11 |
        _55 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.03        0.03
          2 |          2        0.03        0.06
          3 |          1        0.02        0.08
          6 |          2        0.03        0.11
         18 |          1        0.02        0.13
         20 |          2        0.03        0.16
         24 |          1        0.02        0.18
         26 |          1        0.02        0.19
         28 |          1        0.02        0.21
         41 |          1        0.02        0.22
         55 |          1        0.02        0.24
         89 |          1        0.02        0.26
         99 |          1        0.02        0.27
        128 |          1        0.02        0.29
        239 |          1        0.02        0.31
        240 |          1        0.02        0.32
        933 |          1        0.02        0.34
       1738 |          1        0.02        0.35
          . |      6,205       99.65      100.00
------------+-----------------------------------
      Total |      6,227      100.00

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