Frequencies for first 10,000 rows of electrol variable in nhamcsed2010 dataset :

Electrolyte |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      7,590       75.90       75.90
        yes |      2,410       24.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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