Frequencies for first 10,000 rows of pap variable in nhamcsopd1992 dataset :

   Pap test |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,497       94.97       94.97
          1 |        503        5.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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