Frequencies for first 10,000 rows of prov2110 variable in pos2001 dataset :

       srv: |
   coronary |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,837       88.37       88.37
          0 |        606        6.06       94.43
          1 |        532        5.32       99.75
          2 |         22        0.22       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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