Frequencies for d1_irf_c1_63 variable in prds_hosp10_yr2011 dataset :

d1_irf_c1_6 |
          3 |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      6,150      100.00      100.00
------------+-----------------------------------
      Total |      6,150      100.00

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