Frequencies for first 10,000 rows of prov2285 variable in pos2001 dataset :

  srv: open |
      heart |
    surgery |
   facility |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,837       88.37       88.37
          0 |        928        9.28       97.65
          1 |        184        1.84       99.49
          2 |         47        0.47       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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