Frequencies for first 10,000 rows of ekg variable in namcs2002 dataset :

        EKG |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,684       96.84       96.84
        Yes |        316        3.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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