Frequencies for first 10,000 rows of icu_srvc_cd variable in pos2000 dataset :

       srv: |
  intensive |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,871       88.71       88.71
          0 |        384        3.84       92.55
          1 |        712        7.12       99.67
          2 |         28        0.28       99.95
          3 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017