Frequencies for first 10,000 rows of mihx variable in nhamcsed2013 dataset :

       Does |
    patient |
      have: |
 History of |
 myocardial |
 infarction |
       (MI) |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,786       97.86       97.86
        Yes |        214        2.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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