Frequencies for first 10,000 rows of cad variable in nhamcsed2015 dataset :

       Does |
    patient |
      have: |
   Coronary |
     artery |
    disease |
     (CAD), |
   ischemic |
      heart |
    disease |
    (IHD) o |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,325       93.25       93.25
        Yes |        675        6.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017