Frequencies for first 10,000 rows of hpvdna variable in namcs2014 dataset :

    HPV DNA |
       test |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,933       99.33       99.33
        Yes |         67        0.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017