Frequencies for first 10,000 rows of prov2110 variable in pos1997 dataset :

       srv: |
   coronary |
  care unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,792       87.92       87.92
          0 |        611        6.11       94.03
          1 |        569        5.69       99.72
          2 |         24        0.24       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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