Frequencies for first 10,000 rows of flutest variable in nhamcsed2011 dataset :

  Influenza |
       test |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,803       98.03       98.03
        Yes |        197        1.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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