Frequencies for first 10,000 rows of papliq variable in nhamcsopd2009 dataset :

      pap - |
     liquid |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,813       98.13       98.13
        yes |        187        1.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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