Frequencies for first 10,000 rows of electrol variable in nhamcsed2011 dataset :

Electrolyte |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      7,416       74.16       74.16
        Yes |      2,584       25.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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