Frequencies for first 10,000 rows of electrol variable in nhamcsed2008 dataset :

electrolyte |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      7,628       76.28       76.28
        yes |      2,372       23.72      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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