Frequencies for first 10,000 rows of prov2110 variable in pos1999 dataset :

       srv: |
   coronary |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,885       88.85       88.85
          0 |        567        5.67       94.52
          1 |        524        5.24       99.76
          2 |         21        0.21       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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