Frequencies for d_4_hos_c4_57 variable in prds_hosp10_yr2010 dataset :

d_4_hos_c4_ |
         57 |      Freq.     Percent        Cum.
------------+-----------------------------------
       6768 |          1        0.04        0.04
          . |      2,322       99.96      100.00
------------+-----------------------------------
      Total |      2,323      100.00

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