Frequencies for first 10,000 rows of ordperf1 variable in namcs2003 dataset :

       surg |
  procedure |
       #1 - |
  ord/sched |
   or perf? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,042       90.42       90.42
          1 |        377        3.77       94.19
          2 |        483        4.83       99.02
          9 |         98        0.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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