Frequencies for first 10,000 rows of flutest variable in nhamcsed2010 dataset :

      Rapid |
flu/Influen |
    za test |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,771       97.71       97.71
        yes |        229        2.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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