Frequencies for first 10,000 rows of ordperf1 variable in namcs2001 dataset :

       surg |
  procedure |
       #1 - |
  ord/sched |
   or perf? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,789       87.89       87.89
          1 |        460        4.60       92.49
          2 |        656        6.56       99.05
          9 |         95        0.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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