Frequencies for first 10,000 rows of ihd variable in nhamcsopd2011 dataset :

       Does |
patient now |
     have - |
   Ischemic |
      heart |
    disease |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,700       97.00       97.00
        Yes |        300        3.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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