Frequencies for first 10,000 rows of hpvdna variable in namcs2015 dataset :

    HPV DNA |
       test |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,954       99.54       99.54
          1 |         46        0.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 25 Oct 2017