Frequencies for first 10,000 rows of open_hrt_srgry_srvc_cd variable in pos2000 dataset :

  srv: open |
      heart |
    surgery |
   facility |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,871       88.71       88.71
          0 |        897        8.97       97.68
          1 |        183        1.83       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 , 17 May 2017