Frequencies for first 10,000 rows of bpap variable in nhamcsed2014 dataset :

  BPAP/CPAP |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,965       99.65       99.65
        Yes |         35        0.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017