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

      pulse |
   oximetry |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      7,780       77.80       77.80
        yes |      2,220       22.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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