Frequencies for first 10,000 rows of pulsoxim variable in nhamcsed2000 dataset :

      pulse |
   oximetry |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,471       74.71       74.71
          1 |      2,529       25.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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