Frequencies for first 10,000 rows of chf variable in namcs2009 dataset :

       does |
patient now |
      have: |
 congestive |
      heart |
    failure |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,825       98.25       98.25
        yes |        175        1.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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