Frequencies for first 10,000 rows of cardenz variable in nhamcsed2006 dataset :

    cardiac |
    enzymes |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      8,908       89.08       89.08
        yes |      1,092       10.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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