Frequencies for first 10,000 rows of icu_srvc_cd variable in pos2011 dataset :

   Services |
  Provided: |
        ICU |
Medical/Sur |
      gical |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,614       86.14       86.14
          0 |        551        5.51       91.65
          1 |        780        7.80       99.45
          2 |         31        0.31       99.76
          3 |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019