Frequencies for first 10,000 rows of chf variable in namcs2006 dataset :

       does |
patient now |
 have - chf |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,810       98.10       98.10
        yes |        190        1.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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