Frequencies for first 10,000 rows of outtriag variable in nhamcsed1999 dataset :

   referred |
   out from |
     triage |
    without |
  treatment |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,975       99.75       99.75
          1 |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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