Frequencies for first 10,000 rows of open_hrt_srgry_srvc_cd variable in pos2008 dataset :

       srv: |
cardio-thor |
       acic |
    surgery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,655       86.55       86.55
          0 |      1,081       10.81       97.36
          1 |        206        2.06       99.42
          2 |         47        0.47       99.89
          3 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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