Frequencies for first 10,000 rows of electrol variable in nhamcsopd2006 dataset :

electrolyte |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,562       95.62       95.62
        Yes |        438        4.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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