Frequencies for first 10,000 rows of open_hrt_srgry_srvc_cd variable in pos2002 dataset :

  srv: open |
      heart |
    surgery |
   facility |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,812       88.12       88.12
          0 |        951        9.51       97.63
          1 |        187        1.87       99.50
          2 |         46        0.46       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017