Frequencies for first 10,000 rows of cardenz variable in nhamcsed2005 dataset :

    cardiac |
    enzymes |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,795       87.95       87.95
        yes |      1,205       12.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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