Frequencies for s3_1_c9_20 variable in prds_hosp10_yr2017 dataset :

         NF |
    S300001 |
      02000 |
      00900 |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      3,749      100.00      100.00
------------+-----------------------------------
      Total |      3,749      100.00

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