Frequencies for first 10,000 rows of chf variable in namcs2010 dataset :

       does |
patient now |
      have: |
 congestive |
      heart |
    failure |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,870       98.70       98.70
        yes |        130        1.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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