Frequencies for s5_c1_9 variable in hcris2552_10_2017 dataset :

    average |
      times |
  dialyzers |
    re-used |
    s500000 |
00900 00100 |      Freq.     Percent        Cum.
------------+-----------------------------------
          9 |          2        0.05        0.05
         20 |          1        0.03        0.08
       20.3 |          1        0.03        0.11
         31 |          1        0.03        0.13
          . |      3,744       99.87      100.00
------------+-----------------------------------
      Total |      3,749      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2018