Frequencies for first 10,000 rows of cardenz variable in nhamcsed2012 dataset :

    Cardiac |
    enzymes |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,061       90.61       90.61
        Yes |        939        9.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016