Frequencies for first 10,000 rows of icu_srvc_cd variable in pos2017 dataset :

  Services: |
    Medical |
   Surgical |
   ICU Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,569       85.69       85.69
          0 |        594        5.94       91.63
          1 |        763        7.63       99.26
          2 |         29        0.29       99.55
          3 |         45        0.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Jan 2018