Frequencies for first 10,000 rows of outtriag variable in nhamcsed2003 dataset :

  refer out |
from triage |
    without |
  treatment |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,945       99.45       99.45
        yes |         55        0.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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