Frequencies for first 10,000 rows of ordperf1 variable in nhamcsopd2002 dataset :

       surg |
  procedure |
       #1 - |
  ord/sched |
   or perf? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,258       92.58       92.58
          1 |        264        2.64       95.22
          2 |        389        3.89       99.11
          9 |         89        0.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016