Frequencies for first 10,000 rows of electrol variable in nhamcsed2003 dataset :

electrolyte |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,802       88.02       88.02
        yes |      1,198       11.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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