Frequencies for d_4_irf_c11_97 variable in prds_hosp10_yr2010 dataset :

d_4_irf_c11 |
        _97 |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      2,323      100.00      100.00
------------+-----------------------------------
      Total |      2,323      100.00

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