Frequencies for first 10,000 rows of electrol variable in nhamcsed2006 dataset :

electrolyte |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,250       82.50       82.50
        yes |      1,750       17.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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