Frequencies for first 10,000 rows of papunsp variable in namcs2006 dataset :

 pap test - |
unspecified |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,942       99.42       99.42
        yes |         58        0.58      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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