Frequencies for first 10,000 rows of prov2110 variable in pos2003 dataset :

       srv: |
   coronary |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,789       87.89       87.89
          0 |        651        6.51       94.40
          1 |        529        5.29       99.69
          2 |         28        0.28       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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