Frequencies for first 10,000 rows of chf variable in nhamcsopd2005 dataset :

       does |
patient now |
 have - chf |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,795       97.95       97.95
        yes |        205        2.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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