Frequencies for d_4_irf_c13_65 variable in prds_hosp10_yr2013 dataset :

d_4_irf_c13 |
        _65 |      Freq.     Percent        Cum.
------------+-----------------------------------
          3 |          2        0.03        0.03
          9 |          1        0.02        0.05
         22 |          1        0.02        0.06
          . |      6,244       99.94      100.00
------------+-----------------------------------
      Total |      6,248      100.00

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