Frequencies for d_4_hos_c4_50 variable in prds_hosp10_yr2010 dataset :

d_4_hos_c4_ |
         50 |      Freq.     Percent        Cum.
------------+-----------------------------------
      17769 |          1        0.04        0.04
      66136 |          1        0.04        0.09
          . |      2,321       99.91      100.00
------------+-----------------------------------
      Total |      2,323      100.00

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