Frequencies for first 10,000 rows of pap variable in nhamcsopd2000 dataset :

   pap test |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,618       96.18       96.18
          1 |        382        3.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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