Frequencies for s5_c1_9 variable in prds_hosp10_yr2016 dataset :

    s5_c1_9 |      Freq.     Percent        Cum.
------------+-----------------------------------
          3 |          1        0.02        0.02
          9 |          2        0.03        0.05
         12 |          1        0.02        0.06
         17 |          1        0.02        0.08
         20 |          3        0.05        0.13
       20.3 |          1        0.02        0.15
         30 |          1        0.02        0.16
         33 |          1        0.02        0.18
          . |      6,171       99.82      100.00
------------+-----------------------------------
      Total |      6,182      100.00

by Jean Roth , jroth@nber.org , 23 Aug 2018