Frequencies for d_4_ipf_c13_91 variable in prds_hosp10_yr2013 dataset :

d_4_ipf_c13 |
        _91 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          8        0.13        0.13
          2 |          3        0.05        0.18
          3 |          1        0.02        0.19
          4 |          3        0.05        0.24
          5 |          2        0.03        0.27
          6 |          1        0.02        0.29
         13 |          1        0.02        0.30
         16 |          1        0.02        0.32
         21 |          1        0.02        0.34
         27 |          1        0.02        0.35
         75 |          1        0.02        0.37
         88 |          1        0.02        0.38
        137 |          1        0.02        0.40
        189 |          1        0.02        0.42
        215 |          1        0.02        0.43
        362 |          1        0.02        0.45
        502 |          1        0.02        0.46
          . |      6,219       99.54      100.00
------------+-----------------------------------
      Total |      6,248      100.00

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