Frequencies for first 10,000 rows of icu_srvc_cd variable in pos2016 dataset :

  Services: |
    Medical |
   Surgical |
   ICU Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,569       85.69       85.69
          0 |        583        5.83       91.52
          1 |        773        7.73       99.25
          2 |         32        0.32       99.57
          3 |         43        0.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 Jan 2017