Frequencies for s5_c4_6 variable in prds_hosp10_yr2017 dataset :

  Number of |
   stations |
    S500000 |
      00600 |
      00400 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          5        0.13        0.13
          2 |          3        0.08        0.21
          3 |          5        0.13        0.35
          4 |          2        0.05        0.40
          . |      3,734       99.60      100.00
------------+-----------------------------------
      Total |      3,749      100.00

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