Frequencies for first 10,000 rows of electrol variable in nhamcsed2012 dataset :

Electrolyte |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      8,401       84.01       84.01
        Yes |      1,599       15.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016