Frequencies for first 10,000 rows of icu_srvc_cd variable in pos2018 dataset :

  Services: |
    Medical |
   Surgical |
   ICU Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,560       85.60       85.60
          0 |        602        6.02       91.62
          1 |        762        7.62       99.24
          2 |         30        0.30       99.54
          3 |         46        0.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019