Frequencies for first 10,000 rows of pulsoxim variable in nhamcsed2006 dataset :

      pulse |
   oximetry |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      5,568       55.68       55.68
        yes |      4,432       44.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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