Frequencies for first 10,000 rows of prov2285 variable in pos1999 dataset :

  srv: open |
      heart |
    surgery |
   facility |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,885       88.85       88.85
          0 |        887        8.87       97.72
          1 |        179        1.79       99.51
          2 |         46        0.46       99.97
          3 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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