Frequencies for first 10,000 rows of ordperf1 variable in namcs2004 dataset :

       surg |
  procedure |
       #1 - |
  ord/sched |
   or perf? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,874       88.74       88.74
          1 |        430        4.30       93.04
          2 |        615        6.15       99.19
          9 |         81        0.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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