Frequencies for e4_c1_31 variable in prds_hosp10_yr2017 dataset :

    E40A180 |
      03100 |
      00100 |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      3,749      100.00      100.00
------------+-----------------------------------
      Total |      3,749      100.00

by Jean Roth , jroth@nber.org , 26 Oct 2018