Frequencies for d_4_irf_c11_64 variable in prds_hosp10_yr2013 dataset :

d_4_irf_c11 |
        _64 |      Freq.     Percent        Cum.
------------+-----------------------------------
          4 |          2        0.03        0.03
          6 |          1        0.02        0.05
          8 |          1        0.02        0.06
         16 |          1        0.02        0.08
          . |      6,243       99.92      100.00
------------+-----------------------------------
      Total |      6,248      100.00

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