Frequencies for first 10,000 rows of prov2110 variable in pos1998 dataset :

       srv: |
   coronary |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,805       88.05       88.05
          0 |        594        5.94       93.99
          1 |        575        5.75       99.74
          2 |         22        0.22       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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