Frequencies for first 10,000 rows of ordperf2 variable in namcs2003 dataset :

       surg |
  procedure |
       #2 - |
  ord/sched |
   or perf? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,844       98.44       98.44
          1 |         71        0.71       99.15
          2 |         65        0.65       99.80
          9 |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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