Frequencies for first 10,000 rows of icu_srvc_cd variable in pos2014 dataset :

  Services: |
    Medical |
   Surgical |
   ICU Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,592       85.92       85.92
          0 |        569        5.69       91.61
          1 |        772        7.72       99.33
          2 |         32        0.32       99.65
          3 |         35        0.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016