Frequencies for first 10,000 rows of open_hrt_srgry_srvc_cd variable in pos1992 dataset :

  srv: open |
      heart |
    surgery |
   facility |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,851       88.51       88.51
          0 |        907        9.07       97.58
          1 |        184        1.84       99.42
          2 |         54        0.54       99.96
          3 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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