Frequencies for first 10,000 rows of outtriag variable in nhamcsed1997 dataset :

   referred |
   out from |
     triage |
    without |
  treatment |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,966       99.66       99.66
          1 |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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