Frequencies for d_4_hos_c2_56 variable in prds_hosp10_yr2013 dataset :

d_4_hos_c2_ |
         56 |      Freq.     Percent        Cum.
------------+-----------------------------------
      21067 |          1        0.02        0.02
     102558 |          1        0.02        0.03
          . |      6,246       99.97      100.00
------------+-----------------------------------
      Total |      6,248      100.00

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