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

       Does |
patient now |
     have - |
 Congestive |
      heart |
    failure |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,863       98.63       98.63
        Yes |        137        1.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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