Frequencies for first 10,000 rows of prov2110 variable in pos2008 dataset :

 srv: icu - |
    cardiac |
(non-surgic |
        al) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,655       86.55       86.55
          0 |        782        7.82       94.37
          1 |        529        5.29       99.66
          2 |         27        0.27       99.93
          3 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016